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Trademarks = 8

Forward Citations = 1,682

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4 inventors (with patents filed for the assignee):

Lester Hensley (31 out of 34 patents)

Bill Witherspoon (21 out of 22 patents)

William Witherspoon (12 out of 13 patents)

4. Walter Jones (2 out of 2 patents)

37 patents: Sort by Forward Citations

1. 11459748 - Fire resistant expansion joint systems (2022-10-04),

2. 11180995 - Water and/or fire resistant tunnel expansion joint systems (2021-11-23),

3. 10941562 - Fire and water resistant expansion joint system (2021-03-09),

4. 10934704 - Fire and/or water resistant expansion joint system (2021-03-02),

5. 10934702 - Fire and water resistant expansion joint system (2021-03-02),

6. 10851542 - Fire and water resistant, integrated wall and roof expansion joint seal system (2020-12-01),

7. 10794056 - Water and/or fire resistant expansion joint system (2020-10-06),

8. 10787806 - Fire and/or water resistant expansion and seismic joint system (2020-09-29),

9. 10787805 - Fire and/or water resistant expansion and seismic joint system (2020-09-29),

10. 10570611 - Method of making a water resistant expansion joint system (2020-02-25),

11. 10544582 - Expansion joint system (2020-01-28),

12. 10519651 - Fire resistant tunnel expansion joint systems (2019-12-31),

13. 10422127 - Precompressed foam expansion joint system transition (2019-09-24),

14. 10316661 - Water and/or fire resistant tunnel expansion joint systems (2019-06-11),

15. 10179993 - Water and/or fire resistant expansion joint system (2019-01-15),

Emseal is a global leading manufacturer and supplier of innovative, durable, and high-performance expansion joint systems for the construction industry. With over 40 years of experience, Emseal offers a wide range of solutions for sealing and bridging building joints, including walls, decks, roofs, and floors. Their products are designed to withstand extreme conditions, such as seismic movement, temperature changes, and exposure to water, chemicals, and traffic. Emseal's commitment to quality, craftsmanship, and customer satisfaction has made them a trusted choice for architects, contractors, and building owners worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

37 Patents

#7 in Westborough, MA

#523 in Massachusetts

#8,949 in US

#17,726 in the World

Westborough, MA, United States of America

Emseal Joint Systems, Ltd.

Forward Citations = 1,682

4 inventors:

Lester Hensley (31 out of 34 patents)

Bill Witherspoon (21 out of 22 patents)

William Witherspoon (12 out of 13 patents)

4. Walter Jones (2 out of 2 patents)

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