Growing community of inventors

Round Lake, IL, United States of America

David C Griffis

Average Co-Inventor Count = 2.08

ph-index = 4

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 59

David C GriffisPeter Heidrich (4 patents)David C GriffisFotios Golemis (3 patents)David C GriffisWieslaw W Tomczyk (2 patents)David C GriffisGennady Plavnik (2 patents)David C GriffisMichael O'Neill (2 patents)David C GriffisStanton D Saucier (1 patent)David C GriffisFrank Golemis (1 patent)David C GriffisDaniel A Sanchez (1 patent)David C GriffisSimon Evans (1 patent)David C GriffisGary L Takata (1 patent)David C GriffisMichael O'neill (0 patent)David C GriffisDavid C Griffis (11 patents)Peter HeidrichPeter Heidrich (11 patents)Fotios GolemisFotios Golemis (9 patents)Wieslaw W TomczykWieslaw W Tomczyk (6 patents)Gennady PlavnikGennady Plavnik (5 patents)Michael O'NeillMichael O'Neill (2 patents)Stanton D SaucierStanton D Saucier (16 patents)Frank GolemisFrank Golemis (3 patents)Daniel A SanchezDaniel A Sanchez (3 patents)Simon EvansSimon Evans (3 patents)Gary L TakataGary L Takata (2 patents)Michael O'neillMichael O'neill (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Wabtec Holding Corporation (7 from 192 patents)

2. Westinghouse Air Brake Technologies Corporation (3 from 338 patents)

3. Ricon Corporation (1 from 49 patents)


11 patents:

1. D749930 - Handle for a door controller

2. 9097058 - Bonded-in, anti-vandalism transit vehicle window system

3. 8561351 - Skirt for slide-glide door

4. 8291644 - Locking mechanism for pneumatic differential engine for power-operated doors

5. 8171672 - Output shaft, teeter lever and pinion gear arrangement for pneumatic differential engine

6. 8033597 - Glazed transit vehicle door or window

7. D582750 - Modular transit assist handle

8. D562104 - Modular transit assist handle

9. 7320496 - Sealing arrangement for a transit vehicle

10. 7143546 - Sealing arrangement for a transit vehicle

11. 6572177 - Cover for flexible signal connection for a transit vehicle door

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as of
12/13/2025
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