Granted Patent
Utility
US 5,267,785 · App. 07/983,351
Method for switching a pressure control device
Inventor:
Wolfgang Maisch
Patented Case
View Patent ↗
Granted: Dec 7, 1993
Filed: Nov 30, 1992
Inventor
Wolfgang Maisch
Assignee (at issue)
Robert Bosch 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.