Can you still be sued for copyright infringement if you comply with a cease and desist notice? Can a copyright holder sue an infringer without first sending a cease and desist notice? If they do send a notice and the infringer complies, can they still sue?
A cease and desist letter is not binding or mandatory (for copyright infringement, and in most other circumstances). You are not required to send such a letter, and even if you do, any vague suggestion that compliance guarantees that the future plaintiff will not sue is non-binding. Such a letter simply warns the recipient of possible consequences of continuing the action. The closest connection to an enforceable cease and desist letter in the case of copyright infringement is that under DMCA, a plaintiff may send a certain kind of cease and desist letter to an internet service provider, and if they comply (etc.) the provider cannot be sued for contributory infringement.
The actions that constitute patent infringement do not depend upon whether or not the infringer is a nonprofit or not. Disgorgement of profits is one possible remedy for patent infringement, and if the entity made less profits than a for profit company might have under similar circumstances, from the infringement, that particular remedy would be likely to be smaller. But, this would not preclude other remedies such as a reasonable royalty or profits lost by the patent holder due to reduced sales, or injunctive relief.
Your title and your question are totally different. If someone pirates a book, makes printed copies, and sells them for profit, that's the point where it switches from plain copyright infringement to being criminal copyright infringement. Which means jail instead of paying damages is possible. If you buy one of these printed copies, not knowing that they have been created illegally, and not being willfully ignorant that the printed copies were created illegal, then you didn't commit copyright infringement yourself. Since you are asking the question, it's obvious that you now know that there was copyright infringement, and buying any more copies would be encouraging copyright infringement with no excuses for you. You can be sued for damages. It is unlikely to happen since suing takes likely more effort than getting any damages from you is worth. The correct thing to do is ask the seller for your money back and destroy the copies. If they don't refund your money you can inform the copyright holder.
You can report it to the publisher(s) Protection of copyright is a matter for the individual rights holder: some (I’m looking at you Disney) are vigilant, thorough and draconian in protecting their rights, others don’t care at all. Unless you are the rights holder it’s none of your business. In much the same way that the guy charging your neighbour for 4 hours gardening but being long gone in 2 isn’t. If you like your neighbour or feel duty bound to do something, you tell them and then leave it to them what they do with it. This is not a matter for the authorities as it doesn’t rise to the level of criminal copyright infringement. Just like the gardener above, this isn’t a crime.
I've found Google's filtering based on licence to not be very reliable, at least not reliable enough to trust from a practical legal perspective. Using a photo that you don't own the copyright to is a risk. You may be infringing copyright by doing so. The owner may eventually ask you to stop, or they may sue you for damages. Further, some copyright infringement is criminal 17 USC 506. In my opinion, it would be unwise to use a work commercially that you don't affirmatively know you have permission to use.
THE FOLLOWING OPINION IS NOT LEGAL ADVICE Based on your screenshot and description, I don't see anything infringing. If the data you are using is from your own sources, and what you show is not a scan or photo of their guide, and your layout is thus unique in specifics (not a direct copy), it wouldn't be an "infringement" as far as copyright law is concerned. Things you cannot copyright: A font (except as a computer font file but not as used in a document). A concept (a main issue here). A idea for a "way" or "order" to display data. Mere data or facts can not be copyrighted nor can ideas. Anything sourced from the US government (trail data, topos, etc.) Something not in printed, physical, or recorded form. That is, the copyright only extends to those things as they are realized in print, or as a recording for audio or video, or a physical statute, etc. A live performance is not copyrightable for instance, nor are ideas. The Law: In no case does copyright protection for an original work of authorship extend to any idea, procedure, process, system, method of operation, concept, principle, or discovery, regardless of the form in which it is described, explained, illustrated, or embodied in such work. For instance, an icon of a TENT is the common form (like a font) of indicating a camp ground. They may be able to copyright the specific instance of their tent icon, but they cannot prevent you from using some other triangle to represent a tent for a campground. And in facts yours is completely different. Displaying data a particular "way" like 1e for 1 mile east is not copyrightable when it is common for the type of guide. It's just data. CONCEPTS AND DATA ARE NOT COPYRIGHTABLE, only the ACTUAL specific page or work in total as rendered. More below, but your page seems totally different. OTHER FORMS OF IP PROTECTION Now, just because some intellectual property can't be protected by copyright, does not mean it is a free-for-all. For instance, a "way" of doing something can be PATENTED (process patent). And "ornamental design" can be given a design patent. A logo or brand name can be given a trademark. Here's an interesting court ruling on the subject of data display. Basically it can't be an abstraction/concept. It has to be in a definable, physical, novel form. NOTE: it has been possible to copyright a "look and feel" but that applies to software, not static printed media. And the courts have been reversing on that a lot as time goes on. BUT WAIT...THERE'S MORE So, I am going to GUESS that you are talking about AT Guide by David Miller? It's pretty rich of him to claim copyright over the "manner of the display of data" when APPARENTLY he is using concepts of data display as described by EDWARD TUFT So, LOL. Is this the guide they claim you are "copying"?? THESE AREN'T THE ICONS YOU'RE LOOKING FOR Okay, so let's go one by one and their claims against you: 1. The way of representing distances between shelters "The Way" of presenting something is not copyrightable, only an expressive or final form. Some forms of "organization or selection" that may make a work in total copyrightable, but not on their own in isolation. 2. The sideways orientation of the elevation profile Presenting some elements "sideways" is not copyrightable (WTF LOL OMG RUS) the same as number 1. Turning an element sideways does not, on it's own, rise to the level of "creative or non-obvious." 3. The icons Your icons are completely different. If you copied and used his ACTUAL icons, you might have had some issue, but your icons are not even remotely the same. Using icons to indicate services or features is COMMON. Not copyrightable. http://www.dmlp.org/legal-guide/works-not-covered-copyright In general, copyright does not protect individual words, short phrases, and slogans; familiar symbols or designs; or mere variations of typographic ornamentation, lettering, or coloring; mere listings of ingredients or contents. (However, copyright protection may be available, if the artwork of the symbol or design contains sufficient creativity.) 4. The convention of representing direction/distance for waypoints. Again, "The Way" of doing something is not copyrightable, nor is data or facts. 1.1E or 2.3NW are common are they not? I've seen similar treatments elsewhere. It's "obvious and not novel." FINAL FORM, EXPRESSIVE FORM is copyrightable NOT FORMATTING CONCEPTS. Basically, he is saying something along the lines of "I'm formatting paragraphs with a double space, so you can't." The "actual" icon drawings he used are copyrightable. Your icons are clearly different. I assume your mountain-top profile line is taken from some publicly available survey source? So long as you never used a scan of the actual line he uses (and even then?), because he cannot copyright the mountain top profiles themselves! DOES HE EVEN HAVE A VALID COPYRIGHT? For that question, I'd say yes with limitations. His work is a compilation of data. Data can not be copyrighted, but the unique arrangement can in context of the work in total. These three conditions must ALL be present (from http://www.rbs2.com/ccompile.pdf): The collection and assembly of pre-existing material, facts, or data. The selection, coordination, or arrangement of those materials The creation, by virtue of the particular selection, coordination, or arrangement of an original work of authorship. So It seem to be that his guide meets these, but his copyright is for his work in total. You are NOT using his data. You are using your OWN data. Based on my reading of Key vs Chinatown Today you are not even close to infringing. You are doing your OWN selection, and your OWN arrangement. It does not matter that you may be using some similar typographic or charting conventions. Those cannot be copyrighted. You are doing your own thing, and "similarity is not infringement." SEARCH AND YOU WILL FIND On the subject of the copyright, here's the copyright on AT guide: https://cocatalog.loc.gov/cgi-bin/Pwebrecon.cgi?Search_Arg=A.T.+Guide&amp;Search_Code=TALL&amp;PID=FgMjtJ244OxoFULrVoob_CEI8bc_M&amp;SEQ=20190506230418&amp;CNT=25&amp;HIST=1 If the link doesn't work due to expiration or a cookie, it should look like this: It's a matter of using the USPTO search engine "its way" — it's not Google and requires specific search strings. Looks like the assignee or owner is https://antigravitygear.com ? Did THEY contact you or David Miller? Or did they claim to be an attorney? I'd love to see the email. Attorneys don't email dunning letters, by the way (though they may if it was a DMCA takedown request I suppose, but I still doubt it.) If it was an attorney it would be via US mail on attorney letterhead. To the best of my knowledge, you can't file proof of service on an email, it has to be USPS or trackable. This means the guy that made the other PDF is annoyed or whatever. If he claimed to be an attorney, that's VERY illegal if he's not. And one final note: Just being non-profit does not absolve you of copyright infringement. But as I said, I see no infringement here. The other answer that asserted these are covered under "works of art" is not withstanding. There is nothing "expressive" about Miller's guide. Also that other answer cited a source for AUSTRALIAN law, not US. Mere typographic elements do not rise to "an expressive work of art". A mountain profile that is nothing but a illustrative line based on data also does not.
First, I don't know what "Sir is" means - I assume it is a typo of "sue us" and answer on that basis. Also, you don't tell us where you are and local law differs - I will assume US law. They can't sue you successfully - that's not how the "Online Copyright Infringement Liability Limitation Act" works. The way it works is: You give the "online service provider" (YouTube) a notice of the claimed infringement that complies with section 512. YouTube must expeditiously remove or disable access to the allegedly infringing material and take reasonable steps to promptly notify the alleged infringer of the action. The alleged infringer then has the right to object to the takedown. If they do, you have 14 days to bring a lawsuit in the district court alleging breach of copyright: If you don't then YouTube will restore the material - essentially you have given up your claim that the material infringes your copyright, If you do then the court will decide if the material does or does not breach copyright. The alleged infringer can raise a fair use defense if they like and they may or may not be right. If you win, you get damages, if you lose, you pay damages. In practice, you and the alleged infringer may opt for an out of court settlement instead.
Whoever "derived" the illegal derivative work most likely has copyright in his derivations, unless they are not worth copyright protections. Say I take the Harry Potter books and add a few chapters and try to sell it - that's copyright infringement of course, but I have the copyright on these additional chapters. However, I don't have the right to allow you to copy the derived work. And even if you have the right to copy the original work, you don't have the right to copy the derived work because it is a different work. I could extract my changes, and allow you to take them and do with them what you like. You could then create an illegally derived work yourself. I couldn't sue you, but the original copyright holder could. To the comments: One, a work and a derivative of the work are not the same, so even if you have the right to make a copy of a work, that doesn’t give you any right whatsoever to copy a derivative work - they are not the same work. Two, the copyright holder has the exclusive right to control copying and the creation of derivative works. If the copyright holder doesn’t want derivatives to exist, then creating them, copying them etc. is always copyright infringement.