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What Was The First Year For The Ink Shutoff Valve?


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#1 DanF

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Posted 21 September 2011 - 02:20

For Dorics and Coronets?

Thanks.

Dan
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#2 Wahlnut

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Posted 21 September 2011 - 04:30

For Dorics and Coronets?

Thanks.

Dan



Ink shut-off first shown in catalog of 1935. First shut-off advert 1935 (with beginning of the "2nd Generation "full metal jacket cap lip) Bonus answer...First adjustable nib Advert 1934
Syd

Edited by Wahlnut, 21 September 2011 - 04:30.

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#3 simp

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Posted 21 September 2011 - 11:02

Ink shut-off first shown in catalog of 1935. First shut-off advert 1935 (with beginning of the "2nd Generation "full metal jacket cap lip) Bonus answer...First adjustable nib Advert 1934
Syd

Just a doubt about adjustable nib, you say 1934 for advertising, and the patent (US1980159) is filed in 1933 and granted in 1934, but here:

http://www.richardsp...files/doric.htm

is told to be introduced in 1932.

There are some others sources for that date?

Simone
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