Granted Patent
Utility
US 4,883,355 · App. 07/092,669
Slotted thrusters for fluid propelled borescopes
Inventors:
Hamid Saghatchi, Geoffrey L. Taylor
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Sep 3, 1987
Inventors
Hamid Saghatchi
Geoffrey L. Taylor
Assignee (at issue)
Welch Allyn, 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.