Darryl L. Christmas

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Woodstock, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Laser hardened steel cutting rule
- Patent number 6,335,506
- Issue date Jan 1, 2002
- J. F. Helmold & Brothers, Inc.
- Darryl L. Christmas
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Laser hardened steel cutting rule
- Patent number 6,218,642
- Issue date Apr 17, 2001
- J. F. Helmold & Bro., Inc.
- Darryl L. Christmas
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
Container and system for constraining and paying out coiled steel r...
- Publication number 20050274634
- Publication date Dec 15, 2005
- Darryl Christmas
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Application
Laser hardened steel cutting rule
- Publication number 20010015348
- Publication date Aug 23, 2001
- Darryl L. Christmas
- C21 - METALLURGY OF IRON