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Norio Umezawa

USPTO Granted Patents = 8

Average Co-Inventor Count = 2.5

ph-index = 6

Forward Citations = 109(Granted Patents)

Location History:

Hirakata, JA (1978)
Osaka, JP (1988)
Takefu, JP (1987 - 1995)

Company Filing History:

8 out of 27,375

Matsushita Electric Industrial Co., Ltd.

Years Active: 1978-1995

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8 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5398564 - Torque transmission unit of motor (1995-03-21),

2. 5264749 - Electric motor with adhesively mounted magnet yoke (1993-11-23),

3. 5003836 - Worm gear motor with a built-in sensor (1991-04-02),

4. 4748865 - Device for absorbing impulsive torque in motor with worm gear (1988-06-07),

5. D294141 - Electric motor (1988-02-09),

6. 4677335 - Axial gap type coreless electric motor with noise reduction (1987-06-30),

7. 4638203 - Attachment structure for brush holder springs (1987-01-20),

8. 4095166 - DC variable voltage device (1978-06-13),

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