Richard E. Speechley

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Willow Grove, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Surface aerator impeller
- Patent number 4,334,826
- Issue date Jun 15, 1982
- John R. Connolly
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Surface aerator impeller
- Patent number 4,249,863
- Issue date Feb 10, 1981
- Philadelphia Gear Corporation
- John R. Connolly
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Surface aerator impeller
- Patent number 4,163,631
- Issue date Aug 7, 1979
- Philadelphia Gear Corporation
- John R. Connolly
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE