Granted Patent
Utility
US 6,189,435 · App. 09/201,025
Diaphragm
Inventors:
Mark W. Vertanen, Shawn H. Lange
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Nov 30, 1998
Inventors
Mark W. Vertanen
Shawn H. Lange
Assignee (at issue)
Gits Manufacturing Company, LLC
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.