William A. Spring

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Geneva, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for selectively hardening a carbon steel screw
- Patent number 6,364,972
- Issue date Apr 2, 2002
- Illinois Tool Works Inc.
- Mark D. Bauer
- C21 - METALLURGY OF IRON
Information Patent Grant
Screws having selected heat treatment and hardening
- Patent number 6,109,851
- Issue date Aug 29, 2000
- Illinois Tool Works Inc.
- Mark D. Bauer
- C21 - METALLURGY OF IRON