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Searching for Patents

While I've previously mentioned that I use the Google Patent Search feature to research patent numbers that I find on player pianos, I found something this evening that's a real game changer. Getting right to the point, I stumbled onto a link which led to one of Google's sitemaps. Here's the first one I found:


Once I figured out that I could pick any year, followed by the underscore sign '_' and then a 3-digit number (of less than 500), I found that I could find both any patent number and any date that a patent was issued. This is important because many times the manufacturers (who did list their patents on a nameplate) quite often only list a patent date, and not a patent number.

Also, it's been my experience (as it was this evening) that even though I had a patent number, the Google Patent Search feature couldn't find it.

Knowing what I now know, I'll never use the Google Patent Search feature again. Instead, I'll modify the above link as needed to 'get in the ballpark' and go from there.

Happy searching.

John A Tuttle
Brick, NJ, USA

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This page was last revised February 6, 2020 by John A. Tuttle, who Assumes No Liability
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