Granted Patent
Utility
US 4,425,758 · App. 06/361,306
Maintaining hydrostatic system control pressure
Inventors:
Lawrence F. Schexnayder, Jerome A. Thies
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Mar 24, 1982
Inventors
Lawrence F. Schexnayder
Jerome A. Thies
Assignee (at issue)
Caterpillar Tractor Co.
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.