Company Filing History:

9 out of 42,485

Hitachi, Ltd.

patents

1 out of 162

Hitachi Engineering Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1977-1991

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4992715 - Torque control apparatus for rotating motor machine (1991-02-12),

2. 4879502 - Speed control apparatus and method for motors (1989-11-07),

3. 4855652 - Speed control apparatus for a brushless direct current motor (1989-08-08),

4. 4748535 - Method of magnetizing rotor of motor (1988-05-31),

5. 4718247 - Refrigerator temperature control system (1988-01-12),

6. 4709317 - Inverting apparatus (1987-11-24),

7. 4662185 - System of controlling refrigerator temperature (1987-05-05),

8. 4566289 - Refrigerator control system (1986-01-28),

9. 4051417 - Control system for a brushless motor (1977-09-27),

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Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.

For the Inventor, By the Inventor

Kenichi Iizuka

Location History:

Company Filing History:

Years Active: 1977-1991