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

Jun Asai — 21 Patents

Canon: 16 patents #4,179 of 19,416Top 25%
Yamaha Motor: 2 patents #855 of 2,310Top 40%
HCHitachi High-Tech Instuments Co.: 1 patents #31 of 77Top 45%
SCSanyo Electric Co.: 1 patents #3,644 of 6,347Top 60%
FCFuji Electric Co.: 1 patents #1,387 of 2,643Top 55%
Matsumoto, JP: #238 of 1,205 inventorsTop 20%
Overall (All Time): #201,324 of 4,157,543Top 5%
21 Patents All Time
Jun Asai has been granted 21 US patents while listed as an inventor at Canon. The first was granted in 1986 and the most recent in September 2025. Jun Asai ranks #201,324 of 4,157,543 US inventors in our database (top 4.8%). Patent records list Jun Asai in Matsumoto, JP.

Patents per Year

Patents granted per year, 1986 to 2025Bar chart with a peak of 4 patents in 2003.peak 41986: 2 patents19861988: 1 patents1989: 1 patents19891992: 1 patents1993: 2 patents19931995: 2 patents2003: 4 patents20032004: 4 patents2009: 1 patents20092019: 1 patents2021: 1 patents20212025: 1 patents2025

Issued Patents All Time

Showing 1–21 of 21 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12413152 Switching control circuit and power supply circuit Hiroaki Matsumoto 2025-09-09
10888041 Substrate working system and component mounter Kazushi Takama 2021-01-05
10201120 Component mounting apparatus Isao Takahira, Tomohiro Inoue, Hiroshi Ikeda 2019-02-05
7546678 Electronic component mounting apparatus Akira Aoki, Shigeru Kuribara, Akihiro Kawai 2009-06-16 $120,000
6836638 Cleaning device and image forming apparatus provided with same Kazuhumi Muto, Koki Watanabe, Keizo Ogara 2004-12-28 $203,000
6822767 Image processing method and image processing apparatus Ryuji Kawano, Yuji Kamiya 2004-11-23 $191,000
6801747 Cleaning apparatus and image forming apparatus Keizo Ogara, Koki Watanabe 2004-10-05 $143,000
6694122 Cleaning device and image forming apparatus provided with same Kazuhumi Muto, Koki Watanabe, Keizo Ogara 2004-02-17 $286,000
6636719 Image forming apparatus with vibration-caused image defect prevention feature Tsuyoshi Kunishi, Keizo Ogara 2003-10-21 $134,000
6542786 Apparatus and method for feeding electronic components Yoshinori Kano, Haruhiko Yamaguchi, Ikuo Takemura 2003-04-01 $2,000
6538678 Image forming apparatus with development controller Takahiro Nakase, Yuji Kamiya 2003-03-25 $152,000
6516161 Image forming apparatus with surface potential detector 2003-02-04 $122,000
5438399 Image forming apparatus having transfer voltage control 1995-08-01 $33,000
5406360 Image forming apparatus with contact transfer member 1995-04-11 $23,000
5267005 Heater having stepped portion and heating apparatus using same Akira Yamamoto, Atsushi Hosoi, Kensaku Kusaka, Yoshiaki Kobayashi, Hidekazu Maruta +1 more 1993-11-30 $18,000
5182604 Transfer roller with voltage polarity control 1993-01-26 $12,000
5150165 Image forming apparatus having image transfer member 1992-09-22 $9,000
4814886 Image processing process and apparatus therefor Tsukasa Kuge, Takahiro Inoue, Yasushi Sato, Akio Suzuki, Yoshihiro Murasawa +1 more 1989-03-21 $11,000
4719489 Recording apparatus having material feed mode dependent fixing control Masaharu Ohkubo, Yasumasa Ohtsuka, Yoshihiro Murasawa 1988-01-12 $13,000
4626096 Image forming apparatus for forming a visual image in accordance with image signals Yasumasa Ohtsuka, Yoshihiro Murasawa, Hiroshi Sasame, Masaharu Ohkubo 1986-12-02 $10,000
4563694 Image information recording apparatus Masaharu Ohkubo, Yoshihiro Murasawa, Yasumasa Ohtsuka 1986-01-07 $11,000