RT

Ryuji Tsukamoto

FU Fujifilm: 16 patents #543 of 4,519Top 15%
Ricoh Company: 3 patents #4,826 of 9,818Top 50%
Overall (All Time): #230,595 of 4,157,543Top 6%
19
Patents All Time

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDate
12343992 Liquid discharge head, liquid discharge device, and liquid discharge apparatus Masaya SHINGYOH, Kohta Akiyama 2025-07-01
10675865 Liquid discharge apparatus 2020-06-09
10029465 Liquid discharge head, liquid discharge device, and liquid discharge apparatus 2018-07-24
8955952 Ink circulation apparatus, ink circulation method and inkjet recording apparatus 2015-02-17
8955949 Ink circulation apparatus, ink circulation method and inkjet recording apparatus 2015-02-17
8801128 Device and method for driving liquid discharge head, liquid discharge apparatus, and ink-jet apparatus 2014-08-12
8613489 Inkjet ejection apparatus, inkjet ejection method, and inkjet recording apparatus Kenichi Kodama 2013-12-24
8474116 Method of manufacturing piezoelectric element and method of manufacturing liquid ejection head 2013-07-02
8382257 Piezoelectric actuator, method of manufacturing piezoelectric actuator, liquid ejection head, method of manufacturing liquid ejection head and image forming apparatus 2013-02-26
8277008 Method and apparatus for driving inkjet head 2012-10-02
8266773 Method of manufacturing a piezoelectric actuator 2012-09-18
8252365 Method of manufacturing piezoelectric element and method of manufacturing liquid ejection head 2012-08-28
8177336 Method of driving piezoelectric actuator and method of driving liquid ejection head 2012-05-15
8119192 Method of manufacturing piezoelectric element and method of manufacturing liquid ejection head 2012-02-21
7963637 Method of driving piezoelectric actuator and liquid ejection apparatus 2011-06-21
7887163 Piezoelectric actuator, liquid ejection head, image forming apparatus, and method of manufacturing piezoelectric actuator 2011-02-15
7772747 Process for producing a piezoelectric film, film forming apparatus, and piezoelectric film Takamichi Fujii 2010-08-10
7765659 Method of manufacturing a liquid ejection head 2010-08-03
7439659 Piezoelectric actuator, droplet ejection apparatus, and manufacturing method thereof 2008-10-21