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New York, NY, United States of America

National Patent Development Corporation

USPTO Granted Patents = 51

Trademarks = 1

Forward Citations = 1,626

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57 inventors (with patents filed for the assignee):

Richard F Stockel (6 out of 47 patents)

Samuel H Ronel (6 out of 6 patents)

Francis E Ryder (5 out of 109 patents)

4. Petr Kuzma (4 out of 6 patents)

5. Kenneth C Raines (3 out of 66 patents)

6. Sol J Barer (3 out of 20 patents)

7. Daniel G Moro (3 out of 6 patents)

8. Richard Rabenau (3 out of 21 patents)

9. Jaroslav Vit (3 out of 5 patents)

10. Peter Carl Valenti (3 out of 4 patents)

11. Shinji Sakaguchi (3 out of 41 patents)

12. Rowland W Kanner (2 out of 102 patents)

13. Nobuyuki Kita (2 out of 37 patents)

14. Francis E Gould (2 out of 23 patents)

15. Robert J LeFevre (2 out of 11 patents)

Core Competencies:

Hydrophilic Polymers

Dental Treatments

Medication Compliance Aid

Cautery Device

Solar Collector

Burn Dressing

Endodontic Therapeutic Device

Ophthalmic Formulation

Electroconversion Cell

Masonry Construction Member

High Energy Density Batteries

Photosensitive Composition

51 patents: Sort by Forward Citations

1. 5948558 - High energy density boride batteries (1999-09-07),

2. 5804329 - Electroconversion cell (1998-09-08),

3. 5468811 - Hydrophilic composite polymer articles formed from a settable paste (1995-11-21),

4. 5177154 - Environmental coating solution (1993-01-05),

5. 5045266 - Process of making a hearing aid earmold in situ (1991-09-03),

6. 5039342 - Modified asphalt cement compositions and methods of producing the same (1991-08-13),

7. 4957436 - Dental pump system for chemical caries removal (1990-09-18),

8. 4770632 - Delivery system for dental treatment solution (1988-09-13),

9. 4738530 - Inspection device (1988-04-19),

10. 4736872 - Disposable tint pack assembly for contact lens tinting (1988-04-12),

11. 4632055 - Apparatus for tinting soft contact lenses (1986-12-30),

12. 4617557 - Medication compliance aid for unit dose packaging (1986-10-14),

13. 4606342 - Cautery device having a variable temperature cautery tip (1986-08-19),

14. 4518390 - Lens tinting fixture and system utilizing said fixture (1985-05-21),

15. 4452925 - Biologically stabilized compositions comprising collagen as the minor (1984-06-05),

National Patent Development Corporation, based in New York, specializes in the development and commercialization of innovative hydrophilic polymers. The company focuses on a diverse range of applications, including dental treatments, medication compliance aids, and advanced medical devices such as cautery devices and burn dressings. Additionally, it explores ophthalmic formulations and endodontic therapeutic devices, contributing to advancements in healthcare and patient care through its cutting-edge technology and research initiatives.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

51 Patents

#188 in New York, NY

#421 in New York

#6,876 in US

#13,753 in the World

New York, NY, United States of America

National Patent Development Corporation

Forward Citations = 1,626

57 inventors:

Richard F Stockel (6 out of 47 patents)

Samuel H Ronel (6 out of 6 patents)

Francis E Ryder (5 out of 109 patents)

4. Petr Kuzma (4 out of 6 patents)

5. Kenneth C Raines (3 out of 66 patents)

Please report any incorrect information to [email protected]

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