Granted Patent
Utility
US 5,758,913 · App. 08/603,649
Impact resistant electromagnetic lock
Inventors:
Thomas Roth, Dennis E. Wojdan
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: Feb 20, 1996
Inventors
Thomas Roth
Dennis E. Wojdan
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.