Granted Patent
Utility
US 4,989,012 · App. 07/489,797
Antenna assembly
Inventors:
Nils Martensson, Michael B. Ashdown
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Mar 5, 1990
Inventors
Nils Martensson
Michael B. Ashdown
Assignee (at issue)
Technophone Limited
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.