Granted Patent
Utility
US 5,096,271 · App. 07/677,255
Drive assembly, power off retract
Inventor:
John R. Portman
Patented Case
View Patent ↗
Granted: Mar 17, 1992
Filed: Mar 29, 1991
Inventor
John R. Portman
Assignee (at issue)
Sony Trans Com 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.