TREA

of hairpins

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Industry

  • CPC
  • B21G7/04
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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B21Mechanical metalworking B21GMAKING NEEDLES, PINS OR NAILS OF METAL B21G7/00Making pins of U-like shape or split-pins

Current Industry

B21G7/04of hairpins
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3915203
    • Patent number 3,915,203
    • Issue date Oct 28, 1975
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    2723577
    • Patent number 2,723,577
    • Issue date Nov 15, 1955
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    2590364
    • Patent number 2,590,364
    • Issue date Mar 25, 1952
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    1986523
    • Patent number 1,986,523
    • Issue date Jan 1, 1935
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    1709938
    • Patent number 1,709,938
    • Issue date Apr 23, 1929
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    1691516
    • Patent number 1,691,516
    • Issue date Nov 13, 1928
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...