Granted Patent
Utility
US 5,151,946 · App. 07/841,264
Variable configuration portable telephone
Inventor:
Nils Martensson
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Feb 24, 1992
Inventor
Nils Martensson
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.