Granted Patent
Utility
US 4,346,874 · App. 06/153,175
Vacuum actuated holding apparatus for a plastic welding machine
Inventor:
Joseph V. Kurpiewski
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: May 27, 1980
Inventor
Joseph V. Kurpiewski
Assignee (at issue)
General Battery Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.