Granted Patent
Utility
US 4,840,112 · App. 07/142,995
Combined valve/cylinder using electro-rheological fluid
Inventors:
Dilip K. Bhadra, Richard L. Creedon, C. Ross Harder
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Jan 12, 1988
Inventors
Dilip K. Bhadra
Richard L. Creedon
C. Ross Harder
Assignee (at issue)
GA Technologies, 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.