Louis A. Challis

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Woollahra 2025, New South Wales, AU

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Patents Grantslast 30 patents

Information Patent Grant
Fluid discharge silencer
- Patent number 4,596,307
- Issue date Jun 24, 1986
- Louis A. Challis
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Acoustic treatment for fans
- Patent number 4,279,325
- Issue date Jul 21, 1981
- Louis A. Challis
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Acoustic treatment for fans
- Patent number 4,174,020
- Issue date Nov 13, 1979
- Louis A. Challis
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...