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Forward Citations = 61

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8 inventors (with patents filed for the assignee):

Tadao Isono (3 out of 6 patents)

Noriaki Osawa (2 out of 3 patents)

Masao Abe (1 out of 4 patents)

4. Fumio Saito (1 out of 3 patents)

5. Yoshiaki Mizuki (1 out of 3 patents)

6. Takao Ishibashi (1 out of 1 patent)

7. Teruhiko Miyake (1 out of 1 patent)

8. Eiji Aoyama (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 4183640 - Automatic focus adjusting device (1980-01-15),

2. 4174892 - Automatic focusing system (1979-11-20),

3. 4162123 - Automatic focusing system (1979-07-24),

4. 4157217 - Automatic focus adjusting system (1979-06-05),

5. 4146316 - Automatic focus adjusting system (1979-03-27),

6. 4123765 - Automatic focus adjusting device (1978-10-31),

7. 4101843 - Automatic recording level control circuit with manual sensitivity (1978-07-18),

8. 4052125 - Starting and stopping device for sound motion picture camera (1977-10-04),

9. 4015119 - Under exposure and fade indicator (1977-03-29),

10. 3958868 - Sound system pinch roller actuating device (1976-05-25),

11. 3942882 - Film transport speed controlling device (1976-03-09),

Nihon Beru-haueru Kabushiki Kaisha, also known as NHK Spring Co., Ltd., is a Japanese company specializing in the manufacture and sale of various springs and related products. Founded in 1936, NHK Spring has grown into a global leader in the automotive, electronics, and industrial sectors, providing high-quality components for a wide range of applications.

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Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

11 Patents

#2 in Higashimurayama

#4,041 in Japan

#50,190 in the World

Higashimurayama, Japan

Nihon Beru-haueru Kabushiki Kaisha