Granted Patent
Utility
US 4,697,977 · App. 06/926,809
Safety brake for vertical lift
Inventors:
Weston R. Loomer, Randall P. Coons
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Oct 30, 1986
Inventors
Weston R. Loomer
Randall P. Coons
Assignee (at issue)
Litton Systems, 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.