Granted Patent
Utility
US 4,900,964 · App. 07/295,699
Pole face slot filler
Inventors:
Sui-Chun Ying, Robert T. Hagaman
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Jan 11, 1989
Inventors
Sui-Chun Ying
Robert T. Hagaman
Assignee (at issue)
Westinghouse Electric Company LLC
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.