Granted Patent
Utility
US 4,093,104 · App. 05/717,918
Rubber diaphragm type door locking mechanism
Inventor:
John Hutchinson
Patented Case
View Patent ↗
Granted: Jun 6, 1978
Filed: Aug 26, 1976
Inventor
John Hutchinson
Assignee (at issue)
American Sterilizer 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.