Tadayoshi Ebinuma has been granted 11 US patents while listed as an inventor at Kotobuki & Co. . The first was granted in 1989 and the most recent in March 2006. Tadayoshi Ebinuma ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Tadayoshi Ebinuma in Kawagoe, JP.
Patents per Year Patents granted per year, 1989 to 2006 Bar chart with a peak of 2 patents in 1996. peak 2 1989: 1 patents 1989 1990: 1 patents 1990 1991: 1 patents 1991 1992: 1 patents 1992 1996: 2 patents 1996 1998: 1 patents 1998 1999: 1 patents 1999 2000: 1 patents 2000 2002: 1 patents 2002 2006: 1 patents 2006
Issued Patents All Time
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Showing 1–11 of 11 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
7008131 Composite holding device Hidehei Kagevarna , Tadashi Yamamoto , Sachio Arai 2006-03-07
6379067 Double-chuck mechanical pencil Hidehei Kageyama , Yoshihide Mitsuya 2002-04-30
6039485 Double-chuck mechanical pencil Hidehei Kageyama , Yoshihide Mitsuya 2000-03-21
5961237 Writing instrument Shuhei Kageyama , Sachio Arai , Tadashi Yamamoto 1999-10-05
5810496 Writing instrument Shuhei Kageyama , Sachio Arai , Tadashi Yamamoto 1998-09-22
5547301 Writing instrument with rotatable advancement and retraction Shuhei Kageyama , Sachio Arai , Tadashi Yamamoto 1996-08-20
5535487 Clip attachment apparatus for a writing instrument Hidehei Kageyama , Allen Drucker 1996-07-16
$135,599,000
5165813 Container with snap-in chuck and chuck ring Shuhei Kageyama , Yoshio Noguchi , Yoshihide Mitsuya 1992-11-24
5056947 Dual refill-type writing utensil Masuo Kubota , Hidehei Kageyama , Saburo Kobayashi , Yoshihide Mitsuya 1991-10-15
4969763 Lead forwarding mechanism retainer for thurst action mechanical pencil Shuhei Kageyama , Yoshihide Mitsuya 1990-11-13
4856693 Working out container of bar shaped article Shuhei Kageyama , Tadashi Yamamoto 1989-08-15