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Industrial Research Development, Inc.
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Redmond, WA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Roofing cant
Patent number
4,706,418
Issue date
Nov 17, 1987
Industrial Research Development, Inc.
Victor M. Stewart
E04 - BUILDING
Information
Patent Grant
Prefabricated interlocking roofing system
Patent number
4,706,435
Issue date
Nov 17, 1987
Industrial Research Development, Inc.
Victor M. Stewart
E04 - BUILDING
Information
Patent Grant
Roofing system
Patent number
4,680,909
Issue date
Jul 21, 1987
Industrial Research Development, Inc.
Victor M. Stewart
E04 - BUILDING
Patents Applications
last 30 patents
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last 30 trademarks