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Honeycomb structure
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Patent number 10,369,545
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Issue date Aug 6, 2019
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NGK Insulators, Ltd.
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Hirotaka Yamamoto
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3390661
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Patent number 3,390,661
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Issue date Jul 2, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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3201272
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Patent number 3,201,272
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Issue date Aug 17, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3011911
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Patent number 3,011,911
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Issue date Dec 5, 1961
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B28 - WORKING CEMENT, CLAY, OR STONE
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3003220
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Patent number 3,003,220
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Issue date Oct 10, 1961
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B28 - WORKING CEMENT, CLAY, OR STONE
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2964820
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Patent number 2,964,820
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Issue date Dec 20, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2946110
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Patent number 2,946,110
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Issue date Jul 26, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2883090
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Patent number 2,883,090
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Issue date Apr 21, 1959
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B28 - WORKING CEMENT, CLAY, OR STONE
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2843721
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Patent number 2,843,721
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Issue date Jul 15, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2587152
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Patent number 2,587,152
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Issue date Feb 26, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2581249
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Patent number 2,581,249
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Issue date Jan 1, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2447337
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Patent number 2,447,337
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Issue date Aug 17, 1948
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B28 - WORKING CEMENT, CLAY, OR STONE
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2435931
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Patent number 2,435,931
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Issue date Feb 10, 1948
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B28 - WORKING CEMENT, CLAY, OR STONE
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2422537
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Patent number 2,422,537
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Issue date Jun 17, 1947
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B28 - WORKING CEMENT, CLAY, OR STONE
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2347535
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Patent number 2,347,535
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Issue date Apr 25, 1944
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B28 - WORKING CEMENT, CLAY, OR STONE
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2346579
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Patent number 2,346,579
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Issue date Apr 11, 1944
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B28 - WORKING CEMENT, CLAY, OR STONE
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2329114
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Patent number 2,329,114
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Issue date Sep 7, 1943
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B28 - WORKING CEMENT, CLAY, OR STONE
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2295928
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Patent number 2,295,928
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Issue date Sep 15, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE
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2291765
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Patent number 2,291,765
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Issue date Aug 4, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE