Are can openers like the original Swing-A-Way sold under a different name now?
Perhaps: http://www.ez-duz-it.com

St Louis, claims to be only one made in USA, Seems to fit time-wise.

per one of several catalog sites (http://www.sierravalleytrading.com/JOHN-J-STEUBY-CO_c_815.html)

John J Steuby Company
of Hazelwood, Missouri, has purchased the equipment used to manufacture the original,
MADE IN USA, SWING-A-WAY 
can opener and now uses that equipment to manufacture the
EZ-DUZ-IT
can opener.