Granted Patent
Utility
US 4,414,588 · App. 06/139,510
Fluid bearing tape scanning drum
Inventor:
Richard A. Hathaway
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Apr 11, 1980
Inventor
Richard A. Hathaway
Assignee (at issue)
Ampex Corporation
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.