John M. Hetzel Jr.

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Kettering, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Leather firefighter helmet and method for making a leather firefigh...
- Patent number 6,098,197
- Issue date Aug 8, 2000
- Firequip Helmets, Inc.
- John M. Hetzel
- A42 - HEADWEAR
Information Patent Grant
Firefighter's helmet having tilt adjustment
- Patent number 5,113,534
- Issue date May 19, 1992
- Firequip Helmets, Inc.
- Abbott A. Lane
- A42 - HEADWEAR
Information Patent Grant
Firefighter's helmet
- Patent number 5,018,220
- Issue date May 28, 1991
- Firequip Helmets, Inc.
- Abbott A. Lane
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL