Granted Patent
Utility
US 4,525,652 · App. 06/544,402
Auxiliary-voltage source for supplying electric circuits which are at a high potential
Inventors:
Wolfgang Sperzel, Johann Sturmer
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Oct 21, 1983
Inventors
Wolfgang Sperzel
Johann Sturmer
Assignee (at issue)
Leybold-Heraeus 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.