Cambridge, Canada

3l Filters Ltd.


USPTO Granted Patents = 3


Trademarks = 1

Forward Citations = 106

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4 inventors (with patents filed for the assignee):

goldMedal William M Maser (2 out of 2 patents)

silverMedal Frank E Heywood (2 out of 2 patents)

bronzeMedal George T Foss (2 out of 2 patents)

4 Gennady Krylov (1 out of 1 patent)


3 patents:

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USPTO Data Jan 1 1976 - Dec 9 2025

3 Patents

#27 in Cambridge

#4,251 in Canada

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Cambridge, Canada
Forward Citations = 106

4 inventors:

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