with at least one flat vertical wall

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Patents Grantslast 30 patents

Information Patent Grant
3897339
- Patent number 3,897,339
- Issue date Jul 29, 1975
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
3045830
- Patent number 3,045,830
- Issue date Jul 24, 1962
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
2022524
- Patent number 2,022,524
- Issue date Nov 26, 1935
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL