TREA

for grooving or corrugating

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Industry

  • CPC
  • B28B21/965
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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B28Stoneworking B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL B28B21/00Methods or machines specially adapted for the production of tubular articles

Current Industry

B28B21/965for grooving or corrugating
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Machine grooved joint on hollow concrete cylinders
    • Patent number 4,109,635
    • Issue date Aug 29, 1978
    • John C. Rossborough
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2984886
    • Patent number 2,984,886
    • Issue date May 23, 1961
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2713189
    • Patent number 2,713,189
    • Issue date Jul 19, 1955
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2630613
    • Patent number 2,630,613
    • Issue date Mar 10, 1953
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2451713
    • Patent number 2,451,713
    • Issue date Oct 19, 1948
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2291899
    • Patent number 2,291,899
    • Issue date Aug 4, 1942
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    2044178
    • Patent number 2,044,178
    • Issue date Jun 16, 1936
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1547959
    • Patent number 1,547,959
    • Issue date Jul 28, 1925
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1411533
    • Patent number 1,411,533
    • Issue date Apr 4, 1922
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    1411535
    • Patent number 1,411,535
    • Issue date Apr 4, 1922
    • B28 - WORKING CEMENT, CLAY, OR STONE