Nohken Inc.

Calculating rank

USPTO Granted Patents = 8

CIPO Patents = 2

EPO Patents = 2

Forward Citations = 125

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7 inventors (with patents filed for the assignee):

Hiroshi Kawakatsu (4 out of 4 patents)

Kazuhiro Wakabayashi (2 out of 2 patents)

Takayuki Umezawa (2 out of 2 patents)

4. Kouichi Tanaka (1 out of 4 patents)

5. Tadamitsu Iritani (1 out of 2 patents)

6. Hiroshi Uematsu (1 out of 1 patent)

7. Takao Kawakita (1 out of 6 patents)

8 patents: Sort by Forward Citations

1. 7479921 - Distance measuring device, distance measuring method and distance measuring program (2009-01-20),

2. 6922065 - Coil impendance detection method and object detection method and apparatus using the same (2005-07-26),

3. 6769804 - Temperature measuring method, object detecting method and object detecting device with vibrating-type level sensor (2004-08-03),

4. 6292104 - Capacitance type detector (2001-09-18),

5. 6105425 - Vibration type level detector (2000-08-22),

6. 6101873 - Level sensor (2000-08-15),

7. 5247832 - Vibrator-type level sensor (1993-09-28),

8. 4740726 - Vibrator-type level sensor (1988-04-26),

Company Overview

Nohken Inc. is a leading provider of level sensors and control equipment for the industrial and environmental markets. With a focus on innovation and quality, Nohken offers a wide range of products including float switches, ultrasonic sensors, and level transmitters. Their reliable and accurate solutions are used in a variety of industries such as water treatment, chemical processing, and food and beverage production.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

8 Patents

#543 in Osaka

#5,049 in Japan

Osaka, Japan

Nohken Inc.

Forward Citations = 125

7 inventors:

Hiroshi Kawakatsu (4 out of 4 patents)

Kazuhiro Wakabayashi (2 out of 2 patents)

Takayuki Umezawa (2 out of 2 patents)

4. Kouichi Tanaka (1 out of 4 patents)

5. Tadamitsu Iritani (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nohken Inc.. Retrieved from https://idiyas.com/company/nohken

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

2 patents (CIPO):

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

2 patents (EPO):

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]