Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7231049 | Electronic mailing system | Eiji Kawaguchi | 2007-06-12 |
| 6978035 | Information hiding system, method, and printed matter into which information is hidden | Eiji Kawaguchi, Kunihiro Tsuda | 2005-12-20 |
| 6742712 | Information card and information card system | Eiji Kawaguchi, Kunihiro Tsuda | 2004-06-01 |
| 6697498 | Method and computer program product for hiding information in an indexed color image | Eiji Kawaguchi, Michiharu Niimi | 2004-02-24 |
| 6473516 | Large capacity steganography | Eiji Kawaguchi | 2002-10-29 |
| 5748157 | Display apparatus utilizing persistence of vision | — | 1998-05-05 |
| 5485643 | Apparatus and process for trimming a sole of a shoe | Eric Beenfeldt | 1996-01-23 |