Granted Patent
Utility
US 4,903,285 · App. 07/314,750
Efficiency shift register
Inventors:
Daniel G. Knierim, Martin S. Denham
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Feb 24, 1989
Inventors
Daniel G. Knierim
Martin S. Denham
Assignee (at issue)
Tektronic, 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.