Granted Patent
Utility
US 6,102,459 · App. 09/039,753
Vacuum valve
Inventors:
William V. Pabst, Bertrand S. De Pecker
Patented Case
View Patent ↗
Granted: Aug 15, 2000
Filed: Mar 16, 1998
Inventors
William V. Pabst
Bertrand S. De Pecker
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.