Granted Patent
Utility
US 4,255,382 · App. 06/131,880
Thermoforming machine with automatically mechanically operated web stripping element
Inventors:
Albert W. Arends, Ronald E. Henke
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Mar 20, 1980
Inventors
Albert W. Arends
Ronald E. Henke
Assignee (at issue)
Leesona 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.