Granted Patent
Utility
US 5,075,664 · App. 07/406,162
Spring timer for fuse
Inventors:
Keith Allen Spalding, Fred Levko
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Sep 12, 1989
Inventors
Keith Allen Spalding
Fred Levko
Assignee (at issue)
Cooper Industries Holdings
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.