Granted Patent
Utility
US 4,880,084 · App. 07/214,166
Mechanical linear lock with redundant locking feature
Inventors:
Akira Tanaka, Jimmy C. Lee
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Jul 5, 1988
Inventors
Akira Tanaka
Jimmy C. Lee
Assignee (at issue)
P. L. Porter Co.
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.