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Allen, Jason:
I have been collecting information about Lego patents for several years,
and this is my favorite.
The original patent is Danish: DK92683C. Legetøjsbyggeelement. Filed 28 Jan
1958, Granted 29 Jan 1962. This was also amended by patent DK98227C, 9 Mar 1964.
Additionally there are a number of other patents in various countries. They
all make essentially the same claims however they do have different figures.
e.g:
AT211715B. 15 Mar 1960. Bauelement für Bauspielzeuge.
CH362354. 31 May 1962. Bauelement für Bauspielzeuge.
DE1076007. 15 Feb 1960. Bauelement fuer Bauspielzeuge.
FR1208887. Feb 2, 1960.Elément pour jeu de construction.
OA125A. 15 Jan 1966. Elément pour jeu de construction.
UK866557. Apr 26, 1961. Improvements relating to Toy Building Sets.
US3005282. Oct 24, 1961. Toy Building Brick.
The best illustrations are the US patent which you have.
for more information on this patent see my page at:
http://www.isodomos.com/technica/history/1950/1957.php
A planned update will include all of the above information
Thanks
Jim
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