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Tateki Oka

USPTO Granted Patents = 59

Average Co-Inventor Count = 2.1

ph-index = 14

Forward Citations = 613(Granted Patents)

Forward Citations (Not Self Cited) = 599(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Sakai, JP (1980 - 1984)
Toyohashhi, JP (1986)
Toyhashi, JP (1986)
Toyokawa, JP (1983 - 1989)
Aichi, JP (1988 - 1989)
Osaka, JP (1990 - 1991)
Atsugi, JP (1993 - 1996)
Toyohashi, JP (1983 - 2001)

Company Filing History:

56 out of 2,979

Minolta Camera Kabushiki Kaisha

Minolta Company, Ltd.

Years Active: 1980-2001

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Areas of Expertise:

Electrophotographic Image Forming

Image Fixing Device

Developing Apparatus

Toner Supply Device

Magnetic Brush Developing

Color Image Forming

Developer Conveying Device

Image Quality Control

Composite Image Formation

Voltage Limiter Technology

Toner Concentration Detection

Dry Process Development

59 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6266508 - Developing apparatus including an AC voltage applying device (2001-07-24),

2. 5781827 - Developing device having a bias-controlled toner discharging member (1998-07-14),

3. 5493324 - Image forming apparatus (1996-02-20),

4. 5365040 - Fixing device having a temperature control system (1994-11-15),

5. 5303016 - Image fixing device for image forming apparatus including means for (1994-04-12),

6. 5287152 - Electric charge supplying device and system employing the same (1994-02-15),

7. 5287146 - Contact type charging device having voltage limiter (1994-02-15),

8. 5283615 - Image forming apparatus having a plurality of developing devices (1994-02-01),

9. 5262828 - Developing bias power unit for use in an image forming apparatus (1993-11-16),

10. 5255062 - Image forming apparatus having a removal means for separating developers (1993-10-19),

11. 5243390 - Device for conveying developer in a developing device (1993-09-07),

12. 5138385 - Developing device with electrically floating developing roller (1992-08-11),

13. 5134444 - Image forming apparatus (1992-07-28),

14. 5122843 - Image forming apparatus having developing devices which use different (1992-06-16),

15. 5065233 - Color image forming apparatus (1991-11-12),

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