Granted Patent
Utility
US 5,144,501 · App. 07/745,991
Data recorder and method of operation
Inventors:
Yoshizumi Inazawa, Shinya Ozaki, Brian A. Milthorp, Bruce A. Thompson
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Aug 8, 1991
Inventors
Yoshizumi Inazawa
Shinya Ozaki
Brian A. Milthorp
Bruce A. Thompson
Assignees (at issue)
SONY GROUP CORPORATION
Hewlett-Packard Company, L.P.
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.