Granted Patent
Utility
US 4,733,602 · App. 06/840,342
Hydraulic brake actuator with parking brake
Inventors:
Eric G. Smith, Chuck Crawford
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Mar 17, 1986
Inventors
Eric G. Smith
Chuck Crawford
Assignee (at issue)
WABCO GmbH
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.