Granted Patent
Utility
US 4,322,701 · App. 06/143,454
Magnetic circuit for miniature relays
Inventor:
Donald F. Drapeau
Patented Case
View Patent ↗
Granted: Mar 30, 1982
Filed: Apr 24, 1980
Inventor
Donald F. Drapeau
Assignee (at issue)
Hi-G Incorporated
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.