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USPTO Patent Rankings Data through Dec 31, 2025
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Yasuo Iwai — 2 Patents

Hitachi: 2 patents #13,405 of 28,497Top 50%
Hitachinaka, JP: #1,346 of 2,447 inventorsTop 60%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Yasuo Iwai has been granted 2 US patents while listed as an inventor at Hitachi. The first was granted in 1991 and the most recent in August 1994. Yasuo Iwai ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Yasuo Iwai in Hitachinaka, JP.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5339635 Gas turbine combustor of the completely premixed combustion type Shigeru Azuhata, Kenichi Sohma, Kiyoshi Narato, Hironobu Kobayashi, Tooru Inada +4 more 1994-08-23 $158,000
5038558 Gas turbine combustor and a method of combustion thereby Kenichi Sohma, Shigeru Azuhata, Tooru Inada, Hironobu Kobayashi, Kiyoshi Narato +5 more 1991-08-13 $82,000