Granted Patent
Utility
US 4,677,400 · App. 06/721,333
Variable line extender for wave guide
Inventors:
Robert K. Griffith, T. Norman Hardy, Edley V. McKnight, Vladimir K. Vavra
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Apr 8, 1985
Inventors
Robert K. Griffith
T. Norman Hardy
Edley V. McKnight
Vladimir K. Vavra
Assignee (at issue)
Honeywell Limited
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.