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Richard S. Hart
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Elgin, IL, US
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Patents Grants
last 30 patents
Information
Patent Grant
Chair
Patent number
D336380
Issue date
Jun 15, 1993
Systems Furniture Company
James E. Roseen
D06 - Furnishings
Information
Patent Grant
Lavatory
Patent number
D332996
Issue date
Feb 2, 1993
E. I. Du Pont de Nemours and Company
Richard S. Hart
D23 - Environmental heating and cooling
Information
Patent Grant
Fastener
Patent number
5,068,945
Issue date
Dec 3, 1991
Duraco Products, Inc.
Richard S. Hart
B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information
Patent Grant
Side extension for a toy wagon
Patent number
D311554
Issue date
Oct 23, 1990
Radio Flyer Inc.
Richard A. Valiga
D21 - Games, toys, and sports goods
Information
Patent Grant
Side extension for a toy wagon
Patent number
4,930,831
Issue date
Jun 5, 1990
Radio Flyer Inc.
Richard A. Valiga
A63 - SPORTS GAMES AMUSEMENTS