SUGIYAMA KEIJI has a total of 13 patent applications. Its first patent ever was published in 1991. It filed its patents most often in United States and Japan. Its main competitors in its focus markets optics, audio-visual technology and transport are SIMMONS JOHN CASTLE, MEMSOLUTIONS INC and HU DARWIN.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 11 | |
#2 | Japan | 2 |
# | Industry | |
---|---|---|
#1 | Optics | |
#2 | Audio-visual technology | |
#3 | Transport | |
#4 | IT methods for management | |
#5 | Electrical machinery and energy | |
#6 | Environmental technology |
# | Name | Total Patents |
---|---|---|
#1 | Sugiyama Keiji | 13 |
#2 | Yamamoto Kakuya | 8 |
#3 | Kurozuka Akira | 5 |
#4 | Kasazumi Kenichi | 5 |
#5 | Shikii Shinichi | 4 |
#6 | Itoh Tatsuo | 3 |
#7 | Hirai Junichi | 2 |
#8 | Takemura Masashi | 1 |
#9 | Hayashi Katsuhiko | 1 |
Publication | Filing date | Title |
---|---|---|
US2012250306A1 | Transmissive display device | |
JPH06310975A | Frequency stabilizing method in wide temperature range for crystal oscillator and temperature compensation type crystal oscillator | |
JPH05102780A | Frequency stabilizing method for crystal resonator and temperature compensation crystal resonator |