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Thread: Padlock puzzle - photo

  1. #11
    Supporting Member BuffaloJohn's Avatar
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    Here is one more expired patent that has an insteresting OR gate solution:

    Padlock puzzle - photo-page1-us3889497.jpg

    Padlock puzzle - photo-page2-us3889497-2.jpg

    And then there is a circular solution:

    Padlock puzzle - photo-pages-us4997219.jpg

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  2. #12
    Supporting Member Frank S's Avatar
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    Quote Originally Posted by IntheGroove View Post
    Locks only keep honest people out...
    Honest people don't need locks to stay out

    2,000+ Tool Plans
    Never try to tell me it can't be done
    When I have to paint I use KBS products

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