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For the Inventor, By the Inventor

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):

goldMedal Mark P Scott (4 out of 5 patents)

silverMedal Steve A Brough (3 out of 4 patents)

bronzeMedal 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:

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),
Company Overview
Keystone Industries, Inc. is a prominent manufacturer specializing in dental and medical products. The company focuses on developing innovative solutions that enhance the quality and efficiency of dental practices and healthcare settings. With a commitment to research and development, Keystone Industries leverages advanced technologies to create a diverse range of products, including dental materials, equipment, and laboratory supplies. Headquartered in Camp Hill, Pennsylvania, the company serves a global market, emphasizing quality and reliability in its offerings.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

16 Patents

#5 in Camp Hill, PA

#721 in Pennsylvania

#19,935 in US

#37,868 in the World

Camp Hill, PA (US)
Camp Hill, PA, United States of America

Keystone Industries, Inc.

Forward Citations = 118

13 inventors:

goldMedal Mark P Scott (4 out of 5 patents)

silverMedal Steve A Brough (3 out of 4 patents)

bronzeMedal 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Keystone Industries, Inc.. Retrieved from https://idiyas.com/company/keystone-industries

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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