Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9937434 | Photochromic toy | Yutaka Shibahashi, Yoshie Kamiya | 2018-04-10 |
| 9592702 | Friction body, writing instrument and writing instrument set | Takashi Wase, Yoshiaki Okawara | 2017-03-14 |
| 8444450 | Method for alternately expressing color-memorizing photochromic function in toy element, and an alternately color-memorizing photochromic toy | Yutaka Shibahashi, Masahiro Irie | 2013-05-21 |
| 7575386 | Color-memorizing photochromic writing instrument, color-memorizing photochromic writing instrument set using the same and method for alternately expressing color-memorizing photochromic function of writing image | Yutaka Shibahashi, Masahiro Irie | 2009-08-18 |
| 7351362 | Photochromic material | Jun Sugai, Fumihiro Kimura | 2008-04-01 |
| 6943772 | Magnetic display device | — | 2005-09-13 |
| 6713431 | Metallic luster tone thermochromic laminate member | Yutaka Shibahashi | 2004-03-30 |
| 5928803 | Temperature-sensitive reversibly deformable laminate | — | 1999-07-27 |
| 5352649 | Thermochromic laminate member, and composition and sheet for producing the same | Yutaka Shibahashi | 1994-10-04 |