Granted Patent
Utility
US 4,603,437 · App. 06/639,056
Balanced mixer
Inventors:
Michael Dydyk, John K. Lauchner, Lawrence James Schumacher
Patented Case
View Patent ↗
Granted: Jul 29, 1986
Filed: Aug 9, 1984
Inventors
Michael Dydyk
John K. Lauchner
Lawrence James Schumacher
Assignee (at issue)
Motorola, 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.