<P> The safety and litter problems were both eventually solved later in the 1970s with Daniel F. Cudzik 's invention of the non-removing `` Stay - Tab '' . The pull - ring was replaced with a stiff aluminium lever , and the removable tab was replaced with a pre-scored round tab that functioned similarly to the push - tab , but the raised blister was no longer needed , as the riveted lever would now do the job of pushing the tab open and into the interior of the can . </P>
when did they stop making pull tabs on beer cans
1970s