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

Sakae Kitajo — 29 Patents

Nec: 27 patents #306 of 14,502Top 3%
JCJapan E M Co.: 3 patents #2 of 18Top 15%
SKShowa Denko K.K.: 3 patents #463 of 1,736Top 30%
NSNec Toppan Circuit Solutions: 2 patents #3 of 27Top 15%
NDNitto Denko: 2 patents #1,207 of 2,479Top 50%
Tokyo, JP: #4,654 of 90,295 inventorsTop 6%
Overall (All Time): #127,851 of 4,157,543Top 4%
29 Patents All Time
Sakae Kitajo has been granted 29 US patents while listed as an inventor at Nec. The first was granted in 1993 and the most recent in May 2014. Sakae Kitajo ranks #127,851 of 4,157,543 US inventors in our database (top 3.1%). Patent records list Sakae Kitajo in Tokyo, JP.

Patents per Year

Patents granted per year, 1993 to 2014Bar chart with a peak of 4 patents in 2006.peak 41993: 1 patents19931998: 1 patents2001: 1 patents20012002: 3 patents2003: 3 patents20032004: 2 patents2005: 3 patents20052006: 4 patents2007: 2 patents20072008: 2 patents2009: 3 patents20092010: 1 patents2011: 1 patents20112012: 1 patents2014: 1 patents2014

Issued Patents All Time

Showing 1–25 of 29 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8720531 Electronic device cooling apparatus Tomotaka Ishida, Mitsuru Yamamoto, Kazuo Taga, Kazuhiro Kumakura 2014-05-13
8308453 Diaphragm pump Mitsuru Yamamoto, Kazuhito Murata 2012-11-13
8081460 Liquid-cooled heat radiator Tomotaka Ishida, Mitsuru Yamamoto, Kazuhiro Kumakura 2011-12-20
7826225 Expansion tank device, process for fabricating expansion tank device, and liquid cooling radiator Yoshinori Katada, Kazuo Taga, Tomotaka Ishida 2010-11-02 $262,000
7594644 Semiconductor device and method for manufacturing the same, circuit board, electronic apparatus, and semiconductor device manufacturing apparatus Takao Yamazaki, Hirobumi Inoue, Ichiro Hazeyama, Masahiro Kubo, Yoshimichi Sogawa +1 more 2009-09-29
7564164 Drive circuit for piezoelectric pump and cooling system that uses this drive circuit Mitsuru Yamamoto, Sunao Hamamura, Yasuhiro Sasaki 2009-07-21
7483261 Cooling device for an electronic equipment Kazuyuki Mikubo, Atsushi Ochi, Mitsuru Yamamoto 2009-01-27
7420807 Cooling device for electronic apparatus Kazuyuki Mikubo, Yasuhiro Sasaki, Atsushi Ochi, Mitsuru Yamamoto 2008-09-02
7352069 Electronic component unit Ichiro Hazeyama, Masahiro Kubo, Koji Matsui, Kazumasa Igarashi, Hiroshi Noro 2008-04-01
7242828 Optical circuit in which fabrication is easy Mikio Oda, Koji Soejima 2007-07-10 $40,000
7230328 Semiconductor package and laminated semiconductor package Ichiro Hazeyama, Yoshimichi Sogawa, Takao Yamazaki 2007-06-12 $42,000
7119438 Method of arranging microspheres with liquid, microsphere arranging device, and semiconductor device Ichiro Hazeyama, Masahiro Kubo, Kazuhiko Futakami, Shinichi Ishiduka, Susumu Nanko +3 more 2006-10-10 $16,000
7106426 Method of inspecting optical waveguide substrate for optical conduction at increased speed and also inspecting optical waveguide substrate for crosstalk Hideo Kikuchi, Mikio Oda, Hikaru Kouta, Yuzo Shimada, Yoshio Matsumoto +1 more 2006-09-12 $25,000
6999643 Method of manufacturing optical waveguide and method of manufacturing opto-electric wiring board Hideo Kikuchi, Mikio Oda, Hikaru Kouta, Yuzo Shimada 2006-02-14 $24,000
6998704 Semiconductor device and method for manufacturing the same, circuit board, electronic apparatus, and semiconductor device manufacturing apparatus Takao Yamazaki, Hirobumi Inoue, Ichiro Hazeyama, Masahiro Kubo, Yoshimichi Sogawa +1 more 2006-02-14 $24,000
6934429 Optical waveguide board and optical module Hideo Kikuchi, Junichi Sasaki, Seiji Suda, Mikio Oda, Hikaru Kouta +1 more 2005-08-23 $22,000
6926188 Transfer apparatus for arraying small conductive bumps on a substrate and/ or chip Ichiro Hazeyama, Yuzo Shimada, Akeo Katahira, Jun Ishida, Masaru Terashima +1 more 2005-08-09 $21,000
6889886 Transfer apparatus for arraying small conductive bumps on substrate and/ or chip Ichiro Hazeyama, Yuzo Shimada, Akeo Katahira, Jun Ishida, Masaru Terashima +1 more 2005-05-10 $24,000
6829079 Optical path control apparatus with mirror section, and manufacturing method for the same Mikio Oda, Mitsuru Yamamoto, Hikaru Kouta, Yasuhiro Sasaki, Yuzo Shimada 2004-12-07 $41,000
6674016 Electronic component Masahiro Kubo, Ichiro Hazeyama, Koji Matsui, Kazumasa Igarashi 2004-01-06 $32,000
6670208 Optical circuit in which fabrication is easy Mikio Oda, Koji Soejima 2003-12-30 $21,000
6670699 Semiconductor device packaging structure Kazuyuki Mikubo, Yuzo Shimada 2003-12-30 $21,000
6611057 Semiconductor device attaining both high speed processing and sufficient cooling capacity Kazuyuki Mikubo 2003-08-26 $39,000
6477284 Photo-electric combined substrate, optical waveguide and manufacturing process therefor Mikio Oda, Yuzo Shimada, Masataka Itoh, Yoshinobu Kaneyama, Masahiko Fujiwara 2002-11-05 $9,000
6438504 Method of calculating thermal resistance in semiconductor package accommodating semiconductor chip within a case which can be applied to calculation for semiconductor package with radiation fins Kazuyuki Mikubo 2002-08-20 $10,000