Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Topcon › Fumio Ohtomo
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Fumio Ohtomo — 259 Patents

TOTopcon: 227 patents #1 of 684Top 1%
TKTokyo Kogaku Kikai: 16 patents #1 of 143Top 1%
Kabushiki Kaisha Toshiba: 8 patents #3,831 of 21,451Top 20%
KKKabushiki Kaisha Tokyo Kikai: 1 patents #6 of 20Top 30%
KTKabushiki Kaisha Top: 1 patents #53 of 213Top 25%
TOToshiba: 1 patents #1,121 of 2,688Top 45%
Asaka, JP: #1 of 378 inventorsTop 1%
Overall (All Time): #1,838 of 4,157,543Top 1%
259 Patents All Time
Fumio Ohtomo has been granted 259 US patents while listed as an inventor at Topcon. The first was granted in 1981 and the most recent in October 2025. Fumio Ohtomo ranks #1,838 of 4,157,543 US inventors in our database (top 0.04%). Patent records list Fumio Ohtomo in Asaka, JP.

Patents per Year

Patents granted per year, 1995 to 2024Bar chart with a peak of 18 patents in 2000.peak 181995: 2 patents19951996: 10 patents1997: 6 patents1998: 17 patents19981999: 17 patents2000: 18 patents2001: 7 patents20012002: 11 patents2003: 4 patents2004: 7 patents20042005: 4 patents2006: 8 patents2007: 8 patents20072008: 4 patents2009: 5 patents2010: 5 patents20102011: 5 patents2012: 1 patents2013: 1 patents20132014: 7 patents2015: 10 patents2016: 3 patents20162017: 12 patents2018: 9 patents2019: 7 patents20192020: 12 patents2021: 8 patents2022: 11 patents20222023: 4 patents2024: 2 patents2024

Issued Patents All Time

Showing 1–25 of 259 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12455164 Surveying instrument, surveying method and surveying program Takayuki Sasaki, Kazufumi Kumagai 2025-10-28
12123543 Inclination sensor and data acquisition device Fumitoshi Kasahara, Naoki Shoji, Masae Matsumoto, Jun Abe 2024-10-22
11940274 Tilt detecting device and surveying instrument Nobuyuki Nishita, Kaoru Kumagai 2024-03-26
11698254 Surveying instrument having wavelength dispersion compensation prisms and surveying instrument system Ikuo Ishinabe, Kaoru Kumagai 2023-07-11
11598874 Surveying instrument and surveying instrument system Kaoru Kumagai, Tetsuji Anai 2023-03-07
11598637 Surveying instrument Kaoru Kumagai, Tetsuji Anai 2023-03-07
11598854 Surveying system Kaoru Kumagai 2023-03-07
11512957 Surveying instrument Tetsuji Anai, Kaoru Kumagai 2022-11-29
11506759 Surveying instrument and surveying instrument system Ikuo Ishinabe, Kaoru Kumagai 2022-11-22
11460548 Surveying device Kaoru Kumagai 2022-10-04
11421989 Surveying instrument Tetsuji Anai, Kaoru Kumagai 2022-08-23
11415414 Surveying instrument Kaoru Kumagai, Tetsuji Anai 2022-08-16
11402506 Laser measuring method and laser measuring instrument Kaoru Kumagai, Ken-ichiro Yoshino 2022-08-02
11402207 Surveying instrument Tetsuji Anai, Kaoru Kumagai 2022-08-02
11402206 Surveying instrument and surveying instrument system Ikuo Ishinabe, Kaoru Kumagai 2022-08-02
11385052 Surveying instrument Nobuyuki Nishita 2022-07-12
11333496 Surveying instrument Kaoru Kumagai, Tetsuji Anai 2022-05-17
11293754 Surveying instrument Satoshi Hirano, Kaoru Kumagai, Kazuki Osaragi, Nobuyuki Nishita, Tetsuji Anai +1 more 2022-04-05
11193765 Surveying instrument and photogrammetric method Kaoru Kumagai, Tetsuji Anai 2021-12-07
11150346 Measuring method and laser scanner Kaoru Kumagai, Tetsuji Anai 2021-10-19
11035936 Deflecting device and surveying instrument Hideyuki Matsumoto 2021-06-15
11029154 Deflecting device and surveying instrument Hideyuki Matsumoto, Kaoru Kumagai 2021-06-08
10983196 Laser scanner and surveying system Kaoru Kumagai 2021-04-20
10982957 Surveying system Kaoru Kumagai, Satoshi Yanobe 2021-04-20
10921430 Surveying system Kaoru Kumagai, Tetsuji Anai 2021-02-16

Frequent Collaborators

Kaoru Kumagai86 shared
Kazuki Osaragi37 shared
Jun-ichi Kodaira32 shared
Hitoshi Otani29 shared
Tetsuji Anai28 shared
Kunihiro Hayashi27 shared

Nearby-Ranked Inventors

Joel Piaskowski259
Tianyi Gao259
Sung Ho Lee259
Sang Hyun Park259
Moonmo KOO259
Lei Zhao259
Takeshi Takahashi259
Jehuda Shemer259
Tao Li259