Granted Patent
Utility
US 6,031,472 · App. 09/024,883
Encoding/detection method for digital data transmitter with a signal having multiple levels
Inventors:
Howard W. Johnson, Martin H. Graham
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Feb 17, 1998
Inventors
Howard W. Johnson
Martin H. Graham
Assignee (at issue)
And Yet, 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.