Redwood City, CA, United States of America

Craig Husfeld

This inventor holds 85 USPTO granted patents and 19 published patent applications, plus 5 CIPO patents and 8 EPO patents, primarily in Prodrug Chemistry (CPC class A61K45-06). Top assignees: Theravance, Inc., Signature Therapeutics, Inc., Theravance Biopharma R&d IP, LLC. Active years: 2006-2025.

USPTO Granted Patents = 85 (Patent Applications = 19)

% Patents Active = 74.1

CIPO Patents = 5 (Patent Applications = 5)

EPO Patents = 8 (Patent Applications = 9)

Average Co-Inventor Count = 4.1

ph-index = 20

Forward Citations = 1,025(Granted Patents)

Forward Citations (Not Self Cited) = 458(Dec 10, 2025)

Inventors with similar research interests:

Location History:

San Carlos, CA (US) (2014 - 2016)
Redwood City, CA (US) (2006 - 2022)
San Francisco, CA (US) (2020 - 2022)
San Mateo, CA (US) (2013 - 2023)

Company Filing History:

Signature Therapeutics, Inc.

patents

13 out of 262

Theravance Biopharma R&d IP, LLC

patents

4. 7 out of 7

Concentric Analgesics, Inc.

patents

5. 1 out of 8

Elysium Therapeutics, Inc.

patents

Years Active: 2006-2025

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Areas of Expertise:

Prodrugs

Phenolic TRPV1 Agonists

Opioid Prodrugs

Muscarinic Receptor Antagonists

Enzyme-Cleavable Compounds

Quaternary Ammonium Compounds

Biphenyl Compounds

Heterocyclic Linkers

Guanidine-Containing Compounds

Amidine-Containing Compounds

Diphenylmethyl Compounds

Local Anesthesia

85 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12258316 - Biphenyl compounds useful as muscarinic receptor antagonists (2025-03-25),

2. 11634384 - Prodrugs of phenolic TRPV1 agonists (2023-04-25),

3. 11464767 - Prodrugs of phenolic TRPV1 agonists in combination with local anesthetics and vasoconstrictors for improved local anesthesia (2022-10-11),

4. 11400062 - Compositions comprising enzyme-cleavable amphetamine prodrugs and inhibitors thereof (2022-08-02),

5. 11247969 - Biphenyl compounds useful as muscarinic receptor antagonists (2022-02-15),

6. 11242325 - Pegylated prodrugs of phenolic TRPV1 agonists (2022-02-08),

7. 11197933 - Polysubunit opioid prodrugs resistant to overdose and abuse (2021-12-14),

8. 11179355 - Compositions comprising enzyme-cleavable amphetamine prodrugs and inhibitors thereof (2021-11-23),

9. 10851123 - Prodrugs of phenolic TRPV1 agonists (2020-12-01),

10. 10821105 - Prodrugs of phenolic TRPV1 agonists in combination with local anesthetics and vasoconstrictors for improved local anesthesia (2020-11-03),

11. 10717712 - Pegylated prodrugs of phenolic TRPV1 agonists (2020-07-21),

12. 10570092 - Biphenyl compounds useful as muscarinic receptor antagonists (2020-02-25),

13. 10343995 - Biphenyl compounds useful as muscarinic receptor antagonists (2019-07-09),

14. 10106503 - Biphenyl compounds useful as muscarinic receptor antagonists (2018-10-23),

15. 10028945 - Compositions comprising enzyme-cleavable ketone-modified opioid prodrugs and optional inhibitors thereof (2018-07-24),

Title: Craig Husfeld - Innovator from Redwood City

Introduction: Craig Husfeld is a renowned inventor based in Redwood City, California. His innovative spirit and dedication to creating groundbreaking solutions have earned him a significant place in the world of technology and patents.

Latest Patents: Craig Husfeld's latest patents focus on advancements in artificial intelligence and sustainable energy solutions. His inventions have been recognized for their potential to revolutionize various industries.

Career Highlights: With a career spanning over two decades, Craig has a proven track record of turning ideas into tangible inventions. His work has been instrumental in shaping the future of technology and driving progress in the field.

Collaborations: Throughout his career, Craig has collaborated with leading tech companies and research institutions to bring his inventions to life. His ability to work across disciplines and industries has led to the development of cutting-edge technologies.

Conclusion: Craig Husfeld's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors. His contributions to the world of patents and inventions are truly remarkable.