Granted Patent
Utility
US 5,289,526 · App. 07/572,666
Cellular system access monitor
Inventors:
Daryl Chymyck, Kurt T. Lemke
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Aug 24, 1990
Inventors
Daryl Chymyck
Kurt T. Lemke
Assignee (at issue)
SAFCO 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.