Not sure if this helps but look at patent 5700097 http:// patft.uspto.gov/netacgi/nph-Parser? Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO% 2Fsrchnum.htm&r=1&f=G&l=50&s1=5700097.PN.&OS=PN/5700097&RS=PN/5700097
It may lead to something else via the patents it references including a Japanese patent from 1983 On Jul 24, 2008, at 12:29 PM, John Watlington wrote: > > We are looking for examples of keyboards for small children > present before 1993. > > Specifically, we are looking for keyboards whose key-key spacing > is between 10.8 and 16.4 mm horizontally, and 10.8 to 18.0 mm > vertically, and with a stroke distance of 0.9 to 6mm. > > Thanks for your memories, > wad > > http://www.google.com/patents?vid=USPAT7354209 > http://www.google.com/patents?vid=USPAT7101101 > http://www.google.com/patents?vid=USPAT5531529 > > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel