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For the Inventor, By the Inventor

Tokyo, Japan

Kyoritsu Electrical Instruments Works, Ltd.

Calculating rank
USPTO Granted Patents = 19

Trademarks = 2

Forward Citations = 172

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4 inventors (with patents filed for the assignee):

goldMedal Masamichi Kuramoto (11 out of 15 patents)

silverMedal Takeo Kuramoto (7 out of 13 patents)

bronzeMedal Takashi Seike (1 out of 1 patent)

4.  Tomosuke Itoh (1 out of 1 patent)


19 patents:

1. D545704 - Volt-ohm-ammeter (2007-07-03),
2. D490331 - Volt-ammeter (2004-05-26),
3. 6586923 - Non-contact type current measuring instrument (2003-07-01),
4. D476246 - Volt-ohm-ammeter (2003-06-25),
5. D462021 - Electricity measuring instrument (2002-08-28),
6. D446734 - Volt-ohm-ammeter (2001-08-22),
7. D440892 - Volt-ohm-ammeter (2001-04-25),
8. D422229 - Volt-ohm-ammeter (2000-04-04),
9. D401172 - Ammeter (1998-11-17),
10. D358349 - Volt-ohm-ammeter (1995-05-16),
11. D335095 - Voltammeter (1993-04-27),
12. D312420 - Volt-ohm-ammeter or the like (1990-11-27),
13. D271948 - Ampere-volt-wattmeter or the like (1983-12-27),
14. D264448 - Portable volt-ohm-ammeter or the like (1982-05-18),
15. D264057 - Volt-ohm-ammeter or the like (1982-04-27),
Company Overview
Kyoritsu Electrical Instruments Works, Ltd. is a prominent Japanese company specializing in the development and manufacturing of electrical measuring instruments. The organization focuses on a diverse range of products, including multimeters, insulation testers, and earth resistance testers, catering to various industries such as construction, electrical engineering, and telecommunications. With a commitment to innovation, Kyoritsu plays a significant role in advancing measurement technology, ensuring safety and accuracy in electrical applications across Japan and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 10 2026

19 Patents

#1,385 in Tokyo

#3,046 in Japan

#32,767 in the World

Tokyo, JP
Tokyo, Japan

Kyoritsu Electrical Instruments Works, Ltd.

Forward Citations = 172

4 inventors:

goldMedal Masamichi Kuramoto (11 out of 15 patents)

silverMedal Takeo Kuramoto (7 out of 13 patents)

bronzeMedal Takashi Seike (1 out of 1 patent)

4.  Tomosuke Itoh (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kyoritsu Electrical Instruments Works, Ltd.. Retrieved from https://idiyas.com/company/kyoritsu-electrical-instruments-works

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]
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