Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
MO

Mayumi Oh-Hori

Ricoh Company: 2 patents #5,693 of 9,818Top 60%
Overall (All Time): #2,237,331 of 4,157,543Top 55%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6055388 Image forming apparatus and method for obtaining appropriate toner density Shigeru Watanabe, Masaru Tanaka, Haruji Mizuishi, Kenzou Tatsumi, Toshitaka Yamaguchi +3 more 2000-04-25
6006050 Image forming method and apparatus for controlling amount of supplied toner or agitating time Shigeru Watanabe, Masaru Tanaka, Haruji Mizuishi, Toshitaka Yamaguchi, Kenzou Tatsumi +3 more 1999-12-21