Joseph L. Leva

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Contact towers with leak-proof support of improved plate subassembly
- Patent number 4,075,298
- Issue date Feb 21, 1978
- Max Leva
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Preventing wall leakage in contact towers
- Patent number 4,055,610
- Issue date Oct 25, 1977
- Max Leva
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Contact towers with leak-proof support of improved plate subassembly
- Patent number 3,997,633
- Issue date Dec 14, 1976
- Max Leva
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL