Granted Patent
Utility
US 5,883,486 · App. 08/009,092
Apparatus and method for soft-starting a three-phase motor
Inventors:
Walter Earhart, Jr., Dwayne L. Johnson, Rolf M. Hanson
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Jan 20, 1998
Inventors
Walter Earhart, Jr.
Dwayne L. Johnson
Rolf M. Hanson
Assignee (at issue)
American Standard 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.