Granted Patent
Utility
US 6,141,535 · App. 09/312,871
Communication systems for controlling registration of selective call devices
Inventor:
Douglas I. Ayerst
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: May 17, 1999
Inventor
Douglas I. Ayerst
Assignee (at issue)
Motorola, 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.