Granted Patent
Utility
US 4,311,256 · App. 06/155,664
Mechanical breakup actuator
Inventor:
Clyde B. DeArmitt
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: Jun 2, 1980
Inventor
Clyde B. DeArmitt
Assignee (at issue)
Diamond International 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.