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For the Inventor, By the Inventor

Tokyo, Japan

Cambridge Filter Corporation

Calculating rank
USPTO Granted Patents = 15


Trademarks = 11

Forward Citations = 250

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20 inventors (with patents filed for the assignee):

goldMedal Roger T Goulet (4 out of 5 patents)

silverMedal Toshiro Kisakibaru (2 out of 11 patents)

bronzeMedal Stephen M Hladik (2 out of 2 patents)

4.  Jerry R Ellis (2 out of 2 patents)

5.  Peter J Gualtieri (2 out of 3 patents)

6.  Kouta Ueno (1 out of 2 patents)

7.  Akira Yamazaki (1 out of 126 patents)

8.  Isao Honbori (1 out of 6 patents)

9.  Carl J Bauder (1 out of 1 patent)

10.  Robert W Noll (1 out of 4 patents)

11.  Stanley J Wasielewski (1 out of 1 patent)

12.  John A Taddeo (1 out of 1 patent)

13.  Richard W Elbers (1 out of 1 patent)

14.  Allen H Mattison (1 out of 1 patent)

15.  John Taddeo (1 out of 1 patent)


15 patents:

1. 11765810 - Soft X-ray static electricity removal apparatus (2023-09-19),
2. 11480352 - Device for measuring clogging of filter in air conditioner and air conditioner (2022-10-25),
3. 4885015 - HEPA air filter for high temperature environments and method of (1989-12-05),
4. 4795481 - Air filter with high dust-holding capacity (1989-01-03),
5. 4768386 - Air pressure measurement element and system incorporating same (1988-09-06),
6. 4646558 - Method for leak testing air filters (1987-03-03),
7. 4600419 - High efficiency, down flow air filter sealing and support system (1986-07-15),
8. 4548068 - Downflow air filter construction and methods for air flow adjustment and (1985-10-22),
9. 4537812 - Corrugated spacers for pleated air filter media (1985-08-27),
10. 4308041 - Air filter cartridge (1981-12-29),
11. 4227953 - Method of fabricating air filters (1980-10-14),
12. 4199387 - Air filter fabrication method (1980-04-22),
13. 4036054 - Fluid pressure sensing apparatus (1977-07-19),
14. 4030358 - Portable air velocity measuring unit (1977-06-21),
15. 3981192 - Fluid pressure sensing apparatus (1976-09-21),
Company Overview
Cambridge Filter Corporation specializes in advanced filtration solutions, focusing on air and liquid filtration technologies. The company is dedicated to developing innovative products that enhance environmental quality and improve health outcomes across various industries. With a strong emphasis on research and development, Cambridge Filter Corporation aims to address complex filtration challenges, providing effective solutions for applications in sectors such as healthcare, industrial processes, and environmental management. Headquartered in Tokyo, the company leverages its expertise to serve a global market.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

15 Patents

#1,542 in Tokyo

#3,448 in Japan

#39,991 in the World

Tokyo, JP
Tokyo, Japan

Cambridge Filter Corporation

Forward Citations = 250

20 inventors:

goldMedal Roger T Goulet (4 out of 5 patents)

silverMedal Toshiro Kisakibaru (2 out of 11 patents)

bronzeMedal Stephen M Hladik (2 out of 2 patents)

4.  Jerry R Ellis (2 out of 2 patents)

5.  Peter J Gualtieri (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Cambridge Filter Corporation. Retrieved from https://idiyas.com/company/cambridge-filter

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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