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 = 6

Forward Citations = 118

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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.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

16 Patents

#5 in Camp Hill, PA

#721 in Pennsylvania

#19,898 in US

#37,766 in the World

Camp Hill, PA, United States of America

Keystone Industries, Inc.

Forward Citations = 118

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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