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For the Inventor, By the Inventor

Elgin, IL, United States of America

Chicago Rawhide Mfg. Co.

Calculating rank
USPTO Granted Patents = 9

Forward Citations = 111

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12 inventors (with patents filed for the assignee):

goldMedal Dennis L Otto (2 out of 25 patents)

silverMedal Keith W Christiansen (2 out of 11 patents)

bronzeMedal Gordon T Drygalski (2 out of 3 patents)

4.  William M Riley, Jr (2 out of 2 patents)

5.  Donald K Ross (2 out of 8 patents)

6.  Glenn W Peisker (1 out of 5 patents)

7.  Norman C Haas (1 out of 2 patents)

8.  Ronald A Jackowski (1 out of 4 patents)

9.  Gregory R Vassmer (1 out of 1 patent)

10.  Thomas J Burgan (1 out of 1 patent)

11.  Gil Jaime (1 out of 2 patents)

12.  James L Kellner (1 out of 2 patents)


9 patents:

1. 4851176 - Method of forming a fluid seal (1989-07-25),
2. 4689190 - Method of and apparatus for molding a composite fluorocarbon helix seal (1987-08-25),
3. 4643436 - Fluid seals with unitary wear sleeve elements (1987-02-17),
4. 4616836 - Reverse lip positive venting seal (1986-10-14),
5. 4580962 - Seal mold and method (1986-04-08),
6. 4560177 - Contoured shaft seal for high pressure applications (1985-12-24),
7. 4556225 - Reverse lip positive venting seal (1985-12-03),
8. 4526384 - Seal having casing unit with contoured annular inner diameter (1985-07-02),
9. 4522411 - Fluid seals with self-venting auxiliary lips (1985-06-11),
Company Overview
Chicago Rawhide Mfg. Co. is a leading manufacturer of seals and bearings for industrial applications. With a history dating back over a century, they have established themselves as a trusted name in the industry. Their products are known for their quality, reliability, and durability, making them a go-to choice for various sectors including automotive, aerospace, and manufacturing. Visit their website for more information on their product offerings and services.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

9 Patents

#18 in Elgin, IL

#1,551 in Illinois

#32,627 in US

Elgin, IL (US)
Elgin, IL, United States of America

Chicago Rawhide Mfg. Co.

Forward Citations = 111

12 inventors:

goldMedal Dennis L Otto (2 out of 25 patents)

silverMedal Keith W Christiansen (2 out of 11 patents)

bronzeMedal Gordon T Drygalski (2 out of 3 patents)

4.  William M Riley, Jr (2 out of 2 patents)

5.  Donald K Ross (2 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Chicago Rawhide Mfg. Co.. Retrieved from https://idiyas.com/company/chicago-rawhide-mfg-company

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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