For the Inventor, By the Inventor

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Tullytown, PA, United States of America

A-lok Products, Inc.

USPTO Granted Patents = 23

CIPO Patents = 2

Trademarks = 3

Forward Citations = 503

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6 inventors (with patents filed for the assignee):

Jack Ditcher (15 out of 18 patents)

James A Westhoff (11 out of 31 patents)

James A Kelly (6 out of 28 patents)

4. Christopher Handago (3 out of 3 patents)

5. Eric A Ditcher (3 out of 4 patents)

6. John Ditcher (2 out of 7 patents)

7. William C Andrick (10 patents)

23 patents: Sort by Forward Citations

1. 8794639 - Sealing assembly having liquid-filled seal (2014-08-05),

2. 7918464 - Gasket package (2011-04-05),

3. 7624992 - Gasket package (2009-12-01),

4. 5114162 - Gasket for use in manhole bases and the like (1992-05-19),

5. 5054794 - Clamping band for gaskets and the like and expansion means therefor (1991-10-08),

6. 4941643 - Apparatus for forming inverts and manhole assemblies and the like (1990-07-17),

7. 4903970 - Apparatus for providing a watertight seal for manhole pipe connections (1990-02-27),

8. 4890863 - Metallic adjustable clamping band for gaskets (1990-01-02),

9. 4801417 - Methods for forming inverts in manhold assemblies (1989-01-31),

10. 4746127 - Adjustable clamping band for gaskets and method for using same (1988-05-24),

11. 4737220 - Method of making a manhole riser having integral flexible waterlock for (1988-04-12),

12. 4719724 - Precast concrete manhole adjustable bolt slot assembly for securing cast (1988-01-19),

13. 4711455 - Gasket for use in manholes and including clamping band having (1987-12-08),

14. 4685650 - Apparatus for forming inverts and manhole assemblies (1987-08-11),

15. 4621941 - Manhole riser having integral flexible waterlock for manhole covers and (1986-11-11),

A-lok Products, Inc. is a leading manufacturer of precision-engineered sealing products for various industries. With over 30 years of experience, we specialize in designing and producing high-quality fittings, valves, and connectors for fluid and gas systems. Our products are known for their reliability, durability, and excellent performance. With a commitment to continuous improvement and customer satisfaction, A-lok Products, Inc. is dedicated to providing innovative solutions that meet the evolving needs of our clients. Visit our website to explore our range of products and learn more about our company.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

23 Patents

#1 in Tullytown, PA

#526 in Pennsylvania

#13,928 in US

#26,802 in the World

Tullytown, PA, United States of America

A-lok Products, Inc.

Forward Citations = 503

6 inventors:

Jack Ditcher (15 out of 18 patents)

James A Westhoff (11 out of 31 patents)

James A Kelly (6 out of 28 patents)

4. Christopher Handago (3 out of 3 patents)

5. Eric A Ditcher (3 out of 4 patents)

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