Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
MS

Masahisa Sofue — 2 Patents

Hitachi: 2 patents #13,405 of 28,497Top 50%
Ashikawa, JP: #24 of 73 inventorsTop 35%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Masahisa Sofue has been granted 2 US patents while listed as an inventor at Hitachi. The first was granted in 1983 and the most recent in April 1996. Masahisa Sofue ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Masahisa Sofue in Ashikawa, JP.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5511959 Scroll type fluid machine with parts of sintered ceramics Kenji Tojo 1996-04-30 $128,000
4371319 Hermetic motor compressor Akira Murayama, Fumio Harada, Tetsuya Arata, Masato Itagaki, Susumu Nakayama 1983-02-01 $169,000