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Honeycomb structure
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Patent number 10,562,019
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Issue date Feb 18, 2020
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NGK Insulators, Ltd.
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Tatsuyuki Kuki
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B28 - WORKING CEMENT, CLAY, OR STONE
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3D infiltration method
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Patent number 9,943,981
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Issue date Apr 17, 2018
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Voxeljet AG
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Daniel Günther
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3873350
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Patent number 3,873,350
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Issue date Mar 25, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3384048
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Patent number 3,384,048
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Issue date May 21, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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2978350
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Patent number 2,978,350
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Issue date Apr 4, 1961
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B28 - WORKING CEMENT, CLAY, OR STONE
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2821158
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Patent number 2,821,158
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Issue date Jan 28, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2821157
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Patent number 2,821,157
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Issue date Jan 28, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2755205
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Patent number 2,755,205
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Issue date Jul 17, 1956
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B28 - WORKING CEMENT, CLAY, OR STONE
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2560270
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Patent number 2,560,270
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Issue date Jul 10, 1951
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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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2417472
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Patent number 2,417,472
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Issue date Mar 18, 1947
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B28 - WORKING CEMENT, CLAY, OR STONE
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2333557
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Patent number 2,333,557
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Issue date Nov 2, 1943
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B28 - WORKING CEMENT, CLAY, OR STONE
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2275382
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Patent number 2,275,382
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Issue date Mar 3, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE
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2209006
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Patent number 2,209,006
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Issue date Jul 23, 1940
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B28 - WORKING CEMENT, CLAY, OR STONE
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1977704
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Patent number 1,977,704
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Issue date Oct 23, 1934
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B28 - WORKING CEMENT, CLAY, OR STONE
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1531839
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Patent number 1,531,839
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Issue date Mar 31, 1925
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B28 - WORKING CEMENT, CLAY, OR STONE