Granted Patent
Utility
US 4,564,044 · App. 06/588,861
Rotatable valve assembly
Inventors:
Victor Biller, Adelmar Faessler
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Mar 12, 1984
Inventors
Victor Biller
Adelmar Faessler
Assignee (at issue)
Figgie Inernational 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.