Donn Incorporated

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Chicago, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Suspension ceiling grid tee
- Patent number 4,817,357
- Issue date Apr 4, 1989
- Donn Incorporated
- Joseph A. Hocevar
- E04 - BUILDING
Information Patent Grant
Connector for suspension ceiling grid
- Patent number 4,779,394
- Issue date Oct 25, 1988
- Donn, Incorporated
- Richard Shirey
- E04 - BUILDING
Information Patent Grant
Method for producing cold roll-formed structures
- Patent number 4,770,018
- Issue date Sep 13, 1988
- Donn Incorporated
- George F. Bosl
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

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