Granted Patent
Utility
US 5,022,159 · App. 07/443,487
Hand-held can opener
Inventors:
Christopher C. Cressman, David A. Holcomb
Patented Case
View Patent ↗
Granted: Jun 11, 1991
Filed: Nov 29, 1989
Inventors
Christopher C. Cressman
David A. Holcomb
Assignee (at issue)
CHEF'N 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.