Granted Patent
Utility
US 4,490,941 · App. 06/292,359
Spindle door operator
Inventor:
Harry E. Mamach
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Aug 13, 1981
Inventor
Harry E. Mamach
Assignee (at issue)
VAPOR CORP.
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.