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Densei Lambda K.k.

USPTO Granted Patents = 8

% Expired Patents = 12.5

Forward Citations = 65

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14 inventors (with patents filed for the assignee):

Fujitaka Togashi (3 out of 4 patents)

Katsuhiko Nakane (2 out of 3 patents)

Hirokazu Kadoi (2 out of 2 patents)

4. Akinori Miyazaki (2 out of 2 patents)

5. Kazuhiko Takano (2 out of 2 patents)

6. Koichi Soeda (2 out of 3 patents)

7. Koji Okano (2 out of 2 patents)

8. Hiroto Terashi (1 out of 3 patents)

9. Kazuhiro Iwai (1 out of 5 patents)

10. Hideho Yamamura (1 out of 14 patents)

11. Naoki Maru (1 out of 9 patents)

12. Satoshi Tomioka (1 out of 5 patents)

13. Motoharu Ueguri (1 out of 1 patent)

14. Hiroyuki Oka (1 out of 5 patents)

8 patents: Sort by Forward Citations

1. 8138910 - Uninterruptible power supply unit (2012-03-20),

2. D622659 - Battery pack for uninterruptible power supply (2010-08-31),

3. 7525218 - Uninterruptible power supply, uninterruptible power supply system and shutdown processing program product (2009-04-28),

4. 7444208 - Electrical system wiring diagram generating system, and power supply device and program used for the same (2008-10-28),

5. D573533 - Uninterruptible power supply (2008-07-22),

6. 7355829 - Overvoltage protection circuit, and power source, power supply system and electronic apparatus using the overvoltage protection circuit (2008-04-08),

7. 7181630 - Uninterrupted power supply managing system displays connection tree generated from connection information between interrupted power supply device and load devices received from lower controller (2007-02-20),

8. 6483721 - Resonant power converter (2002-11-19),

Densei Lambda K.K. is a leading manufacturer of high-quality power supplies and DC-DC converters. With over 40 years of experience in the industry, we provide reliable and efficient solutions for various applications including telecommunications, industrial automation, and medical equipment. Our products are known for their superior performance, compact design, and long-term reliability. Visit our website to learn more about our innovative power solutions.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

8 Patents

#140 in

#5,035 in Japan

Densei Lambda K.k.

Forward Citations = 65

14 inventors:

Fujitaka Togashi (3 out of 4 patents)

Katsuhiko Nakane (2 out of 3 patents)

Hirokazu Kadoi (2 out of 2 patents)

4. Akinori Miyazaki (2 out of 2 patents)

5. Kazuhiko Takano (2 out of 2 patents)

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