Granted Patent
Utility
US 4,455,932 · App. 06/478,719
Hydraulic cylinder apparatus
Inventors:
Tsuruo Otsuka, Anthony A. Cristofano
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Mar 25, 1983
Inventors
Tsuruo Otsuka
Anthony A. Cristofano
Assignee (at issue)
Verson Allsteel Press Company
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.