Frederick W. John — 1 Patent | Patent Leaderboard

Frederick W. John has been granted 1 US patent. All of these patents were granted in 1981. Frederick W. John ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Frederick W. John in Santa Monica, CA, US.

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Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4274225	Model with two-pole motor actuated siren and flashing lights	Robert J. Knauff, David Fisher, Kenneth Douglas Johnson, Darrell B. Zipp	1981-06-23

Frederick W. John — 1 Patent

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