Inventor
Osamu Tomikawa
Inventor
Tsuchiura, JP
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E02Fprimary
E02FDredging36%
F02DControlling combustion engines14%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes14%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for9%
G07CTime or attendance registers9%
F15BSystems acting by means of fluids in general5%
G05BControl or regulating systems in general5%
G06FElectric digital data processing5%
Y02PClimate change mitigation technologies in the production or processing of goods5%
PatentTitleYear
7,493,112'Construction machine management apparatus and construction machines management system'20097,228,125'Construction machine management apparatus and construction machines management system'20077,079,982'Working machine, trouble diagnosis system of working machine, and maintenance system of working machine'20066,998,957'Security system of construction machinery'20065,632,190'Burglarproof device for hydraulic machine'19975,267,440'Hydraulic control system for construction machine'19935,265,569'Prime mover rotational speed control system'19935,048,296'Anti-vibration apparatus in a hydraulic system for boom cylinder of working apparatus'19915,036,817'Engine remote control system'19914,955,344'Apparatus for controlling rotational speed of prime mover of construction machine'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–2009Patents assigned to HITACHI CONSTRUCTION MACHINERY (9)· patent assignee history
1990Based in Ibaragi, JP· patent location history
1991Patents assigned to HITACHI CONSTRUCTION CO LTD (1)· patent assignee history
1991–1993Based in Tsuchiura, JP· patent location history
1997Based in Ibaraki, JP· patent location history
2006–2009Based in Kita-adachi-gun, JP· patent location history
2006Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI CONSTRUCTION MACHINERY | 9 | 1990–2009 |
| HITACHI CONSTRUCTION CO LTD | 1 | 1991 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tsuchiura, JP | 4 | 1991–1993 |
| Kita-adachi-gun, JP | 3 | 2006–2009 |
| Tokyo, JP | 1 | 2006 |
| Ibaraki, JP | 1 | 1997 |
| Ibaragi, JP | 1 | 1990 |