Granted Patent
Utility
US 5,152,260 · App. 07/680,494
Highly efficient pneumatically powered hydraulically latched actuator
Inventors:
Frederick L. Erickson, William E. Richeson
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Apr 4, 1991
Inventors
Frederick L. Erickson
William E. Richeson
Assignee (at issue)
North American Philips 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.