Granted Patent
Utility
US 4,809,770 · App. 07/151,178
Archbound seal for toroidal regenerator
Inventors:
Robert Hornblower Meyer, Ronald C. Pampreen
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Feb 1, 1988
Inventors
Robert Hornblower Meyer
Ronald C. Pampreen
Assignee (at issue)
WILLIAMS INTERNATIONAL CO., L.L.C.
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.