Granted Patent
Utility
US 4,371,201 · App. 06/190,962
Reversing ratchet door closer
Inventors:
Arthur J. Stock, Donald Christopher
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Sep 26, 1980
Inventors
Arthur J. Stock
Donald Christopher
Assignee (at issue)
Stock Equipment Co., Inc.
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.