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It was application 725139. Lawyers were Clarence O'brien and Harvey Jacobson.

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  • Assuming it is a US patent, it expired in 1898. Perhaps you left a digit off the patent number?
    – Eric S
    Commented Dec 17, 2021 at 4:09
  • Is there a particular reason you want to know the commissioner of patents in 1947? No one is going to know that so we would just do the same google search you would.
    – Eric S
    Commented Dec 17, 2021 at 4:20

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