Granted Patent
Utility
US 3,986,565 · App. 05/536,529
Exhaust means for percussion tool motors
Inventor:
Gerald O. Atkinson
Patented Case
View Patent ↗
Granted: Oct 19, 1976
Filed: Dec 26, 1974
Inventor
Gerald O. Atkinson
Assignee (at issue)
Hughes Tool 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.