Theodore B. Keyes — 1 Patent at 3M

Theodore B. Keyes has been granted 1 US patent while listed as an inventor at 3M. All of these patents were granted in 1997. Theodore B. Keyes ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Theodore B. Keyes in Windom, MN, US.

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Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5602739	Vehicle tracking system incorporating traffic signal preemption	Jeffrey D. Haagenstad, Steven M. Hamer, Ronald Allen Hagen, Edmund J. Ring, Kim K. Christopher	1997-02-11	$20,052,000

Theodore B. Keyes — 1 Patent

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