Approx year of This Koken ?

[titan]

The patent plate on back has 3 dates: 1891, 1895 and 1901 being the last date. Someone told me that the next patent date issued by Koken was 1910, therefore, indicating this chair would have been manufactured between 1901 - 1910 ? Any info would be greatly appreciated.

Also needing a head rest (just posted on a recent post here) and a swivel ankle rest.

Thanks Kurk

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