Granted Patent
Utility
US 5,235,261 · App. 07/869,627
DC powered surgical handpiece having a motor control circuit
Inventor:
Christopher Philipp
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Apr 16, 1992
Inventor
Christopher Philipp
Assignee (at issue)
STRYKER CORPORATION
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.