For the Inventor, By the Inventor

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Camp Hill, PA, United States of America

Keystone Industries, Inc.

USPTO Granted Patents = 16

Trademarks = 7

Forward Citations = 114

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13 inventors (with patents filed for the assignee):

Mark P Scott (4 out of 5 patents)

Steve A Brough (3 out of 4 patents)

Anthony L Lucas (3 out of 9 patents)

4. Charles L Van Auken (3 out of 3 patents)

5. Russell J Huggins (2 out of 3 patents)

6. Jay R Sheesley (2 out of 2 patents)

7. Julius I Pershwitz (1 out of 5 patents)

8. John F Deppen (1 out of 4 patents)

9. Allen D Smith (1 out of 1 patent)

10. Todd A Krahl (1 out of 1 patent)

11. Marlin E Clark (1 out of 1 patent)

12. Vaughn Terrey Hawthorne (1 out of 2 patents)

13. Ross G Carle (1 out of 1 patent)

16 patents: Sort by Forward Citations

1. 6012397 - Railway car outlet gate assembly with inertial latch (2000-01-11),

2. 5927523 - Rail car buffer (1999-07-27),

3. 5908123 - Rail car buffer and method (1999-06-01),

4. 5746335 - Double acting center-of-car cushioning device (1998-05-05),

5. 5671684 - Railway car outlet gate assembly with automatic lock (1997-09-30),

6. 5598937 - Slackless drawbar assembly (1997-02-04),

7. 5584251 - Railway car outlet gate assembly with automatic lock (1996-12-17),

8. 4601461 - Lading protection device (1986-07-22),

9. 4562929 - Backstop assembly for use with cushioning device in sill of railway car (1986-01-07),

10. 4534298 - Lock and seal for hopper outlet (1985-08-13),

11. 4312607 - Pellet gate for pneumatic discharge hopper car (1982-01-26),

12. 4304338 - Center-of-car cushioning device with gas return (1981-12-08),

13. 4224879 - Railway hopper car door latch (1980-09-30),

14. 4033616 - Automotive vehicle door retarding and closing mechanism (1977-07-05),

15. 4026418 - Hydraulic cushioning unit with a gas return (1977-05-31),

Keystone Industries, Inc. is a leading provider of dental, medical, and veterinary supplies. With over 100 years of industry experience, they offer innovative products and solutions for customers worldwide. Their wide range of products includes dental impression materials, rotary instruments, and medical syringes. Keystone Industries is committed to excellence in quality, service, and customer satisfaction.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

16 Patents

#5 in Camp Hill, PA

#711 in Pennsylvania

#19,280 in US

#36,651 in the World

Camp Hill, PA, United States of America

Keystone Industries, Inc.

Forward Citations = 114

13 inventors:

Mark P Scott (4 out of 5 patents)

Steve A Brough (3 out of 4 patents)

Anthony L Lucas (3 out of 9 patents)

4. Charles L Van Auken (3 out of 3 patents)

5. Russell J Huggins (2 out of 3 patents)

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