Granted Patent
Utility
US 5,311,024 · App. 07/850,339
Lens arrangement for intrusion detection device
Inventors:
Douglas H. Marman, William E. Abel
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Mar 11, 1992
Inventors
Douglas H. Marman
William E. Abel
Assignee (at issue)
Sentrol, 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.