The Chess Variant Pages
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Link to: IBM Patent Server

IBM has a website where much information on US patents can be found. Dennis Guthrie attended me on this website, and wrote:
It has US patents in text form back to 1971 and in image form back to 1980. Since it has a search function, you can look for "chess" and get all manner of chess patents. Some are for clocks and other chess periphenalia, but most are for chess variants. By adding other search keys like "3-player" you can get more selective. Particularly the ones after 1980 are useful because the scanned images have diagrams of the special boards and pieces many of the variants require. There are also links to referenced patents and patents that in turn reference the subject patents, so chess scholars can trace possible historical linkages of the different games.
There are many interesting patents on chess variants to be found in this site.
In order to facilitate maintenance of links, separate pages will be made for outgoing links with a small description. Thus, when a link changes, I need to change only one link on one spot. Note that I have no connection to the linked sites.
WWW page created: August 22, 1997.