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Ann Arbor, MI, United States of America

Difco Laboratories Incorporated

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USPTO Granted Patents = 20

Trademarks = 3

Forward Citations = 584

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16 inventors (with patents filed for the assignee):

Jerry W Smith (6 out of 15 patents)

Ruth F Eden (6 out of 13 patents)

Leon F Strenkoski (4 out of 4 patents)

4. Gideon Eden (3 out of 30 patents)

5. Nadine M Sullivan (3 out of 3 patents)

6. Deborah R Siena (3 out of 3 patents)

7. Jon C Wannlund (3 out of 6 patents)

8. Amy T Meszaros (3 out of 3 patents)

9. Thomas E Thompson (2 out of 2 patents)

10. Steven H Boyd (1 out of 7 patents)

11. Charles A Abbas (1 out of 1 patent)

12. Ray M McMillian (1 out of 3 patents)

13. Mandar S Nagar (1 out of 1 patent)

14. Shoba C Swamy (1 out of 1 patent)

15. Maureen A Schneider (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 6670174 - Culture dish package and method of making (2003-12-30),

2. 5843699 - Rapid microorganism detection method (1998-12-01),

3. 5827680 - Three reagent gram staining method and kit (1998-10-27),

4. 5759847 - System and apparatus for automatically transferring media (1998-06-02),

5. 5672484 - Microbiological culture bottle, and method of making and using same (1997-09-30),

6. 5411893 - Dry slide for diagnostic tests (1995-05-02),

7. 5393661 - Three reagent gram staining method and kit (1995-02-28),

8. 5340747 - Diagnostic microbiological testing apparatus and method (1994-08-23),

9. 5232839 - Detecting microbiological growth (1993-08-03),

10. 5223402 - Method of detecting microbes utilizing chemiluminescent compound (1993-06-29),

11. 5188965 - Reagent source for chemiluminescent reactions, test kit, and method for (1993-02-23),

12. 5164301 - Process and kit for detecting microbial metabolism (1992-11-17),

13. 5159197 - Luminescence test and exposure apparatus (1992-10-27),

14. 5096668 - Diagnostic test slide (1992-03-17),

15. 5063090 - Lecithin as a wettability enhancing coating for plastic (1991-11-05),

Company Overview

Difco Laboratories Incorporated, based in Ann Arbor, MI, specializes in the development and manufacturing of high-quality microbiological culture media and related products. The company serves a diverse range of industries, including pharmaceuticals, food and beverage, and clinical diagnostics, providing essential tools for quality control and research. With a focus on innovation and reliability, Difco Laboratories is committed to advancing microbiological testing and ensuring safety and efficacy in various applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 10 2026

20 Patents

#43 in Ann Arbor, MI

#591 in Michigan

#16,444 in US

#31,380 in the World

Ann Arbor, MI, United States of America

Difco Laboratories Incorporated

Forward Citations = 584

16 inventors:

Jerry W Smith (6 out of 15 patents)

Ruth F Eden (6 out of 13 patents)

Leon F Strenkoski (4 out of 4 patents)

4. Gideon Eden (3 out of 30 patents)

5. Nadine M Sullivan (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Difco Laboratories Incorporated. Retrieved from https://idiyas.com/company/difco-laboratories

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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