Inventor
Dai Watanabe
Inventor
Hitachi, JP
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B61Lprimary
B61LGuiding railway traffic25%
H04LTransmission of digital information, e.g. telegraphic communication25%
G06FElectric digital data processing19%
G01NInvestigating or analysing materials by determining their chemical or physical properties9%
G06NComputing arrangements based on specific computational models9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
B60LPropulsion of electrically-propelled vehicles3%
PatentTitleYear
8,548,654'Signaling system'20138,526,615'Storage system executing encryption and decryption processing'20138,122,075'Pseudorandom number generator and encryption device using the same'20128,108,682'Hash value generator'20127,903,816'Storage system executing encryption and decryption processing'20117,756,613'Signaling system'20107,372,962'Storage system executing encryption and decryption processing'20087,359,515'Method and apparatus for symmetric-key decryption'20087,280,659'Pseudorandom number generating apparatus or encryption or decryption apparatus using the same'20077,269,487'Method for train positioning'20077,224,796'Pseudorandom number generating apparatus or encryption or decryption apparatus using the same'20077,201,350'Signaling safety system'20077,200,232'Method and apparatus for symmetric-key decryption'20077,165,748'Train position detection system'20077,110,545'Method and apparatus for symmetric-key encryption'20067,099,754'Signal safety method, signal safety apparatus and signal safety system'20067,006,012'Automatic train stop system'20066,732,023'Train control method and apparatus'20045,506,938'Expert system development support system and expert system environment utilizing a frame processing technique'19965,359,701'Expert system development support system and expert system environment utilizing a frame processing tecnique'19945,228,117'Expert system development support system and expert system environment utilizing a frame processing technique'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1993–2013Patents assigned to HITACHI LTD (21)· patent assignee history
1993–2013Based in Hitachi, JP· patent location history
2006–2008Based in Kamakura, JP· patent location history
2007Based in Chiyoda-ku, JP· patent location history
2008–2013Based in Kawasaki, JP· patent location history
2012–2013Patents assigned to WATANABE DAI (4)· patent assignee history
2013Patents assigned to FUJIMOTO KAZUHISA (1)· patent assignee history
2013Patents assigned to KATSUTA KEIICHI (1)· patent assignee history
2013Patents assigned to MIZUNO MAKIO (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 21 | 1993–2013 |
| WATANABE DAIself | 4 | 2012–2013 |
| FUJIMOTO KAZUHISA | 1 | 2013 |
| KATSUTA KEIICHI | 1 | 2013 |
| MIZUNO MAKIO | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachi, JP | 10 | 1993–2013 |
| Kawasaki, JP | 5 | 2008–2013 |
| Kamakura, JP | 5 | 2006–2008 |
| Chiyoda-ku, JP | 1 | 2007 |