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Donald E. Cadwell
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St. Paul, MN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Lithographic plate
Patent number
4,687,729
Issue date
Aug 18, 1987
Minnesota Mining and Manufacturing Company
Donald E. Cadwell
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Lithographic substrate and its process of manufacture
Patent number
4,542,089
Issue date
Sep 17, 1985
Minnesota Mining and Manufacturing Company
Donald E. Cadwell
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Lithographic substrate and its process of manufacture
Patent number
4,457,971
Issue date
Jul 3, 1984
Minnesota Mining and Manufacturing Company
Donald E. Cadwell
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Lithographic substrate and its process of manufacture
Patent number
4,420,549
Issue date
Dec 13, 1983
Minnesota Mining and Manufacturing Company
Donald E. Cadwell
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS