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How can I find glass cutting patents? Apparently they use a different numbering system than ordinary patents. For example, according to glass collectors, the following patent was registered:

63,795 / “Exotic Flower” / William P. Moran / 18 Jan 1923 / 15 Jan 1924

However, U.S. patent 63795 does not correspond to this patent.

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  • @RodrigodeAzevedo Try it before recommending it. Type in US63795 and see if the patent I listed above appears. – Cicero Sep 22 at 12:17
  • US Patent 63795 is a table knife, so I'm guessing the reference you found, which I'm guessing is from this page is not valid. Furthermore, there are no patents by William P Moran (well, there are, but they are from the 1990's). When doing patent searches, I find that patents.google.com is a good resource. – Ron Beyer Sep 22 at 12:32
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    Searching for one of them (16720 “Strawberry Diamond and Star”) I get exactly 3 websites, that seem to quote one another. Sure that it is a patent and not a misquote where someone took Pat as Patent instead of pattern? And sure it is even a US patent? I am quite sure that you can't patent a non functional pattern... – Trish Sep 22 at 13:22
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    @Cicero Where, exactly, did you come up with that (mistaken) idea? – CGCampbell Sep 22 at 15:11
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The reason why I could not find the patent is that there are several different kinds of patents. Mechanical patents, for example, are "utility" patents. The cut glass pattern referenced in the question is not a utility patent, it is a design patent. Each patent type has its own numbering system. To search for a design patent, typically a "D" is inserted before the patent number, like "D63795". This results in the correct patent being discovered:

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  • So, it's a misquote - missing the D – Trish Sep 22 at 16:55
  • In the U.S. their are only three kinds of patents. Utility, Design and Plant. – George White Sep 22 at 17:43
  • @Trish The glass collectors assume that the reader is experienced enough to know that a design patent is being referenced. I did not have that experience and obviously neither did you. – Cicero Sep 22 at 18:23
  • @GeorgeWhite That's my goal in life: to patent a plant. – Cicero Sep 22 at 23:36

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