Granted Patent
Utility
US 4,531,339 · App. 06/603,256
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Inventors:
Walter Tomaszewski, James H. C. Yang
Patented Case
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Granted: Jul 30, 1985
Filed: Apr 23, 1984
Inventors
Walter Tomaszewski
James H. C. Yang
Assignee (at issue)
The Firestone Tire & Rubber Company
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.