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Thread: 3-D printing some anti-tilt mag followers

  1. #11
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    Quote Originally Posted by nova3930 View Post
    There's a research exemption in patent law that would likely let him get away with it as long as he's not doing it with the intent to sell commercially or as part of a business.
    Not as far as I know - no exceptions.

  2. #12
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    Quote Originally Posted by tb-av View Post
    http://defcad.org/ar-15-magazine/

    Don't know it's anti-tilt or not, but that place should lead you to something.
    That's what I was talking about in my post. I just didn't feel like googling ha.

  3. #13
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    Quote Originally Posted by rsilvers View Post
    Not as far as I know - no exceptions.
    http://scholar.google.com/scholar_ca...=1&oi=scholarr

    In short, regardless of whether a particular institution or entity is engaged in an endeavor for commercial gain, so long as the act is in furtherance of the alleged infringer's legitimate business and is not solely for amusement, to satisfy idle curiosity, or for strictly philosophical inquiry, the act does not qualify for the very narrow and strictly limited experimental use defense. Moreover, the profit or non-profit status of the user is not determinative.
    Now I'm no lawyer but I did stay at a Holiday Inn Express once and it seems to me that fiddling with a 3D printer to see if you can make something fits the idle curiosity criteria as long as he's not in the firearms business. As I read it, Duke lost the case because using the patents furthered their business of research and education.

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    He does not want it to experiment. He wants it to use instead of buying one.

    BTW - obviously no one is going to go after you for making a follower. If they did, and it would be ridiculous to do so, but if they did, you would be out a lot of money before the case was dismissed. But that would never happen.
    Last edited by rsilvers; 02-11-13 at 20:02.

  5. #15
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    Quote Originally Posted by rsilvers View Post
    He does not want it to experiment. He wants it to use instead of buying one.

    BTW - obviously no one is going to go after you for making a follower. If they did, and it would be ridiculous to do so, but if they did, you would be out a lot of money before the case was dismissed. But that would never happen.
    This will be my last word because its pointless to argue such an inane legal matter without being a judge or lawyer, but to me, him wondering how to do it along with questioning the durability makes the experimentation case. Reading the case decision i linked in its entirety it seems like the entire intent of the exception is specifically to keep patent holders from coming after people playing around in their garage with no business or commercial intent.

    Essentially its a legal construct in case the common sense in the second part of your post is absent. And i agree not even a patent troll is coming after an individual.
    Last edited by nova3930; 02-11-13 at 20:17.

  6. #16
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    He is wondering about the strength and that is why he is making it? No. He stated he is making it because he is not able to find more for sale.

    In any case, no one will mind a guy making one.
    Last edited by rsilvers; 02-11-13 at 20:41.

  7. #17
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    Just a little info on the defcad follower. The design will use about $3.60 in ABS plus material printing at .007 z slice and a .012 path width. Note, you need to remember that the layers are fused together which reduces the strength. Almost like grain in a piece of wood. Build orientation is very important to achieve the testing results you're looking for.



    Spec's on the material:

    Tensile Strength (Type 1, 0.125”, 0.2”/min) ASTM D638 5,300 psi
    Tensile Modulus (Type 1, 0.125”, 0.2”/min) ASTM D638 330,000 psi
    Tensile Elongation (Type 1, 0.125”, 0.2”/min) ASTM D638 3% 3%
    Flexural Strength (Method 1, 0.05”/min) ASTM D790 7,600 psi
    Flexural Modulus (Method 1, 0.05”/min) ASTM D790 320,000 psi
    IZOD Impact, notched (Method A, 23°C) ASTM D256 2.0 ft-lb/in
    NRA Lifetime Member
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  8. #18
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    I'd make some. If you're not selling or making a 1009374748393ion who cares.
    rcsperformanceonline.com

  9. #19
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    Quote Originally Posted by rsilvers View Post
    He is wondering about the strength and that is why he is making it?

    No.

    He stated he is making it because he is not able to find more for sale.

    It would cost $30,000 - $600,000 to win a legal case, which is exactly the reason why no one would ever go after him either (besides not even caring that he did it).
    Well i lied because im bored and the more i think about it the more interesting i think the question is.

    The exception exists via the court decision i posted. Scotus declined to hear the case so it is the law of the land. IMO its a simple question that must be answered to determine if it fits namely "is it a private individual who is seeking to learn something?" if the answer is yes then the exception fits. I dont think the original rationale for attempting it as a private individual has any bearing.

    That opinion and a smooth buck will buy you a hamburger at micky ds so take it for what its worth although this law review article seems to be saying the same...

    http://www.finnegan.com/resources/ar...8-1a4130257a92

  10. #20
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    Quote Originally Posted by Blowby View Post
    Just a little info on the defcad follower. The design will use about $3.60 in ABS plus material printing at .007 z slice and a .012 path width. Note, you need to remember that the layers are fused together which reduces the strength. Almost like grain in a piece of wood. Build orientation is very important to achieve the testing results you're looking for.



    Spec's on the material:

    Tensile Strength (Type 1, 0.125”, 0.2”/min) ASTM D638 5,300 psi
    Tensile Modulus (Type 1, 0.125”, 0.2”/min) ASTM D638 330,000 psi
    Tensile Elongation (Type 1, 0.125”, 0.2”/min) ASTM D638 3% 3%
    Flexural Strength (Method 1, 0.05”/min) ASTM D790 7,600 psi
    Flexural Modulus (Method 1, 0.05”/min) ASTM D790 320,000 psi
    IZOD Impact, notched (Method A, 23°C) ASTM D256 2.0 ft-lb/in
    Ive never looked into it before, what kind of shear strength do the bonds between layers have? Seems like that would be a primary concern given the type of forces a follower sees in the anti tilt function

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