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IDTitleDate
US4490811 String comparator device system circuit and method 1981-12-17
US4406626 Electronic teaching aid 1982-03-29
EP0136379 Associative memory circuit system and method 1983-10-03
US4758955 Hand-held spelling checker and method for reducing redundant information in the storage of textural material 1985-07-19
USD300534S Digital display spelling dictionary 1986-11-19
US4830618 Electronic spelling machine 1987-10-23
US5113340 Search improvements for electronic spelling machine 1988-05-25
US4891775 Electronic word game machine 1988-05-27
US5007019 Electronic thesaurus with access history list 1989-01-05
USD321366 Curved font 1989-06-16
US4982181 Alphanumeric display 1989-07-28
US5203705 Word spelling and definition educational device 1989-11-29
US5218536 Electronic spelling machine having ordered candidate words 1990-01-02
US5153831 Electronic text 1990-05-29
US5333313 Method and apparatus for compressing a dictionary database by partitioning a master dictionary database into a plurality of functional parts and applying an optimum compression technique to each part 1990-10-22
US5229936 Device and method for the storage and retrieval of inflection information for electronic reference products 1991-01-04
US5295070 Electronic dual language dictionary 1991-05-31
US5396606 Address bus switching between sequential and non-sequential ROM searches 1991-07-31
US5321609 Electronic encyclopedia 1992-05-27
US5249965 Electronic word selection machine 1992-08-06
USD348439 Electronic ROM card reader 1992-09-17
USD349281 Computer card package for providing additional memory and data for a digital book 1992-10-20
US5497474 Data stream addressing 1993-02-25
US5602963 Voice activated personal organizer 1993-10-12
US5435564A Electronic word building machine 1993-12-22
USD362271S Electronic book with display screen and folding cover 1994-09-01
USD364861S Computer card package 1994-09-01
USD362272S Electronic book with display screen 1994-09-01
USD362461S Electronic book with display screen and speaker 1994-09-01
US5640552 Method and apparatus for providing multi-level searching in an electronic book 1995-02-27
US5717938A Coded cartridges for electronic books 1995-06-16
US5627726 Electronic card with printed circuit board as outer surface 1995-08-07
US5774109 Electronic scrolling book with temporary interruptions 1995-12-29
US5739451 Hand held electronic music encyclopedia with text and note structure search 1996-12-27
US5895463A Compression of grouped data 1997-05-20
US5978591 Personal information device and method for downloading reprogramming data from a computer to the personal information device via the PCMCIA port or through a docking station with baud rate conversion means 1998-02-24
US6205540B1 Processor with enhanced instruction set 1998-06-19
US6223233B1 Wallet for personal information device 1998-11-11
US6202209B1 Personal information device and method for downloading reprogramming data from a computer to the personal information device via the PCMCIA port or through a docking station with baud rate conversion means 1999-08-05
US20050216755A1 Secure portable electronic reference device 2004-03-25