Granted Patent
Utility
US 4,956,923 · App. 07/433,021
Probe assembly including touchdown sensor
Inventors:
James T. Pettingell, Kenneth F. Hollman
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Nov 6, 1989
Inventors
James T. Pettingell
Kenneth F. Hollman
Assignee (at issue)
The Micromanipulator Company, LLC
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.