Douglas D. Smith

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Littleton, CO, US

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Patents Grantslast 30 patents

Information Patent Grant
Lightweight asphalt based building materials and process for making...
- Patent number 4,634,622
- Issue date Jan 6, 1987
- Manville Corporation
- Kenneth L. Jenkins
- E04 - BUILDING
Information Patent Grant
Shingle stacker with shingle inverting feature
- Patent number 4,384,813
- Issue date May 24, 1983
- Manville Service Corporation
- Douglas D. Smith
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Method and apparatus for manufacturing a laminated shingle
- Patent number 4,233,100
- Issue date Nov 11, 1980
- Johns-Manville Corporation
- Richard N. Cunningham
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Apparatus for forming thermal insulation blocks
- Patent number 4,218,962
- Issue date Aug 26, 1980
- Johns-Manville Corporation
- Richard N. Cunningham
- D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS