HT

Hitoshi Tsujino

IBM: 15 patents #7,450 of 70,183Top 15%
HG HGST: 7 patents #263 of 1,677Top 20%
Overall (All Time): #198,110 of 4,157,543Top 5%
22
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7573671 Disk device with reduced flutter Kohji Serizawa, Hirokazu Tanizawa, Motoji Takemoto 2009-08-11
7545599 Disk drive with vibration suppression member disposed near head assembly Kohji Serizawa, Hirokazu Tanizawa, Takeji Sumiya 2009-06-09
7486484 Arm chamfer for comb type actuator in rotating disk storage device and carriage assembly Hiroyasu Tsuchida, Hirokazu Tanizawa, Takeji Sumiya 2009-02-03
7483239 Magnetic disk drive with adjustment of rotational balance Tomoki Hiramatsu, Takahisa Okada, Takeji Sumiya 2009-01-27
7460340 Disk drive, and actuator and head actuator assembly Hirokazu Tanizawa, Hiroyasu Tsuchida 2008-12-02
7317595 Suspension assembly and rotary disk storage device Hiroyasu Tsuchida, Kohichi Suzuki 2008-01-08
6940699 Disk drive apparatus having a pivot for supporting a head assembly to allow free pivoting Toshihiko Yuki, Jun Ishikawa, Naoaki Kanada 2005-09-06
6480362 Flex cable, head suspension assembly, and hard disk drive Keiichiroh Yoshida, Naoaki Kanada, Jun Ishikawa 2002-11-12
6424501 Disk drive ramp structure having integrated discrete rigid support elements for data storage device Keiichiro Yoshida, Jun Ishikawa, Shinichi Kimura 2002-07-23
6327814 Apparatus and method for attaching a hard disk drive to a personal computer system Jun Ishikawa, Katsumasa Nakatsukasa, Yoshiroh Amano 2001-12-11
6212046 Arm assembly for a disk drive device and a method for fabricating the same David W. Albrecht, Akihiko Aoyagi, Masahiko Katoh, Masaki Kobayashi, Surya Pattanaik +1 more 2001-04-03
6185075 Actuator arm assembly for a magnetic storage device David W. Albrecht, Masahiko Katoh, Jun Ishikawa 2001-02-06
6055133 Disk drive head support arm and arm assembly utilizing plural datum features David W. Albrecht, Akihiko Aoyagi, Masahiko Katoh, Tzong-Shii Pan 2000-04-25
6034843 Actuator arm assembly and wiring aparatus used in a disk storage system for wiring voice coil wires to a flex cable Mutsuro Ohta, David W. Albrecht 2000-03-07
5896245 Structure in a disk drive system for attaching a load beam to a head actuator carriage including a mountplate having side ends surrounding a swage hole Akihiko Aoyagi, Hiroyasu Tsuchida, Tatsuo Nakamoto, Shingo Tsuda, Mutsuro Ohta 1999-04-20
5796555 Transducer suspension system having bosses with different inner diameters, and equal outer diameters Akihiko Aoyagi, Mutsuro Ohta, Nobuyuki Hashi 1998-08-18
5646802 Disk drive with head suspensions mounted to actuator arm opposite sides to face respective upper and lower surfaces of disk Hiroyuki Akiyama, Akihiko Aoyagi, Kazuhiko Takada 1997-07-08
5543982 Disk drive apparatus having a device inside the disk drive housing for electrically connecting a spin motor cable outside the housing to a connector outside the housing Tatsuo Takagi 1996-08-06
5532891 Disk drive apparatus 1996-07-02
5508860 Disk drive design having reduced height and improved means for electrical connections Tatsuo Takagi, Seiichi Yasufuku 1996-04-16
5483400 Disk drive apparatus 1996-01-09
5315464 Disk apparatus and manufacturing method thereof 1994-05-24