Granted Patent
Utility
US 4,316,309 · App. 06/082,430
Tentering clip chain
Inventor:
Hans Richter
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: Oct 9, 1979
Inventor
Hans Richter
Assignee (at issue)
Marshall and Williams Company
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.