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USPTO Patent Rankings Data through Dec 31, 2025
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Akio Doi — 6 Patents

IBM: 5 patents #18,770 of 70,183Top 30%
KCKoken Co.: 1 patents #43 of 123Top 35%
Tokyo, JP: #23,316 of 90,295 inventorsTop 30%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Akio Doi has been granted 6 US patents while listed as an inventor at IBM. The first was granted in 1989 and the most recent in July 2013. Akio Doi ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Akio Doi in Tokyo, JP.

Patents per Year

Patents granted per year, 1989 to 2013Bar chart with a peak of 2 patents in 1996.peak 21989: 1 patents19891996: 2 patents19961998: 2 patents19982013: 1 patents2013

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8480408 Medical training model device Toku Ishii, Kentaro Katamachi, Kyoko Noguchi, Hiroshi Uno 2013-07-09
5808620 System and method for displaying shadows by dividing surfaces by occlusion into umbra penumbra, and illuminated regions from discontinuity edges and generating mesh Takayuki Ito, Kenji Shimada 1998-09-15 $10,805,000
5742293 Data visualizer utilizing exterior selected and depth sorted polyhedron faces Koji Koyamada, Sakae Uno 1998-04-21 $18,070,000
5537520 Method and system for displaying a three dimensional object Akio Koide 1996-07-16 $6,072,000
5499323 Volume rendering method which increases apparent opacity of semitransparent objects in regions having higher specular reflectivity Koji Koyamada, Tatsuo Miyazawa 1996-03-12 $19,192,000
4865423 Method for generating images 1989-09-12 $15,532,000