Craig S. Ludwig

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White Salmon, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ceiling module perimeter seal
- Patent number 6,351,920
- Issue date Mar 5, 2002
- Clean Pak International, Inc.
- Larry Hopkins
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Clean room ceiling structure light fixture wireway
- Patent number 5,794,397
- Issue date Aug 18, 1998
- Cleanpak International, Inc.
- Craig S. Ludwig
- E04 - BUILDING
Information Patent Grant
Sheet metal construction system
- Patent number 5,628,581
- Issue date May 13, 1997
- PACE Company
- Michael D. Hintz
- E04 - BUILDING
Information Patent Grant
Light and filter support structure
- Patent number 5,613,759
- Issue date Mar 25, 1997
- Brod & McClung - Pace Co.
- Craig S. Ludwig
- E04 - BUILDING
Information Patent Grant
Clean room ventilation system
- Patent number 5,454,756
- Issue date Oct 3, 1995
- PACE Company
- Craig S. Ludwig
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Directional air diffuser panel for clean room ventilation system
- Patent number 5,192,348
- Issue date Mar 9, 1993
- Brod & McClung - Pace Co.
- Craig S. Ludwig
- F24 - HEATING RANGES VENTILATING