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Richard Shen

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  • Tainan, R.O.C., TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Length-adjustable latch
    • Patent number 4,840,413
    • Issue date Jun 20, 1989
    • Richard Shen
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Easily adjustable latch
    • Patent number 4,840,412
    • Issue date Jun 20, 1989
    • Richard Shen
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Heavy-duty panic proof lock unit
    • Patent number 4,838,053
    • Issue date Jun 13, 1989
    • Richard Shen
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Low friction super heavy-duty lever handle lockset
    • Patent number 4,756,178
    • Issue date Jul 12, 1988
    • Richard Shen
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Amphi-latch for a tubular lockset
    • Patent number 4,750,766
    • Issue date Jun 14, 1988
    • Richard Shen
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Latchbolt slide extension
    • Patent number 4,744,232
    • Issue date May 17, 1988
    • Richard Shen
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES