SAKURAI YOSHIFUMI has a total of 15 patent applications. Its first patent ever was published in 1975. It filed its patents most often in Japan, EPO (European Patent Office) and United States. Its main competitors in its focus markets audio-visual technology, machines and electrical machinery and energy are ROLA COMPANY AUSTRALIA PROPRIE, ZHANG KUNLIANG and TDK ELECTRONICS CO LTD.
# | Country | Total Patents | |
---|---|---|---|
#1 | Japan | 13 | |
#2 | EPO (European Patent Office) | 1 | |
#3 | United States | 1 |
# | Industry | |
---|---|---|
#1 | Audio-visual technology | |
#2 | Machines | |
#3 | Electrical machinery and energy | |
#4 | Computer technology | |
#5 | Optics | |
#6 | Surface technology and coating |
# | Technology | |
---|---|---|
#1 | Special information storage | |
#2 | Magnets and transformers | |
#3 | Unspecified technologies | |
#4 | Unspecified technologies | |
#5 | Electrography | |
#6 | Static stores | |
#7 | Coating metallic material |
# | Name | Total Patents |
---|---|---|
#1 | Sakurai Yoshifumi | 15 |
#2 | Saiki Koji | 4 |
#3 | Saiki Kouji | 3 |
#4 | Onishi Kouji | 3 |
#5 | Satou Masatoshi | 2 |
#6 | Suzuki Keiji | 2 |
#7 | Matsushita Shunsuke | 2 |
#8 | Akasaka Hideki | 2 |
#9 | Kimura Fumito | 2 |
#10 | Tsujimoto Hiroaki | 1 |
Publication | Filing date | Title |
---|---|---|
JPS635505A | Vertically magnetized film and manufacture thereof | |
JPS61544A | Vertically magnetizable film | |
JPS60170213A | Magnetic thin film and manufacture thereof | |
JPS6016409A | Vertical magnetization film | |
JPS59160164A | Magnetooptic recording material | |
JPS59148157A | Photomagnetic recording medium | |
JPS5967612A | Manufacture of photomagnetic recording medium | |
JPS58215744A | Photothermal magnetic recording medium | |
JPS58215013A | Manufacture of vertical magnetization film | |
JPS5867006A | Laminated vertically magnetizing film |