Granted Patent
Utility
US 5,165,069 · App. 07/559,825
Method and system for non-invasively identifying the operational status of a VCR
Inventors:
James Joseph Vitt, Allen L. Fulmer, Daozheng Lu
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Jul 30, 1990
Inventors
James Joseph Vitt
Allen L. Fulmer
Daozheng Lu
Assignee (at issue)
A.C. Nielsen Company
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.