Granted Patent
Utility
US 5,668,533 · App. 08/474,098
High security balanced-type, magnetically-actuated proximity switch system
Inventors:
John T. Jackson, Jr., Robert C. Cook, Robert C. Hunt
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Jun 7, 1995
Inventors
John T. Jackson, Jr.
Robert C. Cook
Robert C. Hunt
Assignee (at issue)
Securitron Magnalock 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.