File:Forstner bit Patent CA23548.png

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English: Page of patent patent CA23548.
Deutsch: Seite des Patents CA23548.
Date
Source https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=CA&NR=23548A&KC=A&FT=D&ND=&date=18860306&DB=&locale=en_EP#
Author Benjamin Forstner
Public domain

The author died in 1897, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.

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current23:47, 28 November 2016Thumbnail for version as of 23:47, 28 November 20161,819 × 2,572 (322 KB)Jahobr (talk | contribs)crop
23:46, 28 November 2016Thumbnail for version as of 23:46, 28 November 20163,181 × 3,538 (383 KB)Jahobr (talk | contribs)removing transparent area
23:43, 28 November 2016Thumbnail for version as of 23:43, 28 November 20161,819 × 2,572 (323 KB)Jahobr (talk | contribs){{Information |Description ={{en|1=Page of patent patent CA23548.}} {{de|1=Seite des Patents CA23548.}} |Source =https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=CA&NR=23548A&KC=A&FT=D&ND=&date=18860306&DB=&locale=en_EP...

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