Granted Patent
Utility
US 4,962,751 · App. 07/357,806
Hydraulic muscle pump
Inventor:
Allan I. Krauter
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: May 30, 1989
Inventor
Allan I. Krauter
Assignee (at issue)
Welch Allyn, Inc.
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.