Growing community of inventors

Brea, CA, United States of America

Carl L Erwin

Average Co-Inventor Count = 1.80

ph-index = 3

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 = 55

Carl L ErwinJack H Kulp (2 patents)Carl L ErwinMark Fernandez (1 patent)Carl L ErwinDusan Krulj (1 patent)Carl L ErwinHerbert J Kramer (1 patent)Carl L ErwinJohn R Bartholdson (1 patent)Carl L ErwinCarl L Erwin (6 patents)Jack H KulpJack H Kulp (75 patents)Mark FernandezMark Fernandez (3 patents)Dusan KruljDusan Krulj (3 patents)Herbert J KramerHerbert J Kramer (2 patents)John R BartholdsonJohn R Bartholdson (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Flex-o-lite, Inc. (3 from 10 patents)

2. Other (1 from 832,880 patents)

3. National Signal, Inc. (1 from 6 patents)

4. Signal, Inc. (1 from 1 patent)


6 patents:

1. 6971196 - Message sign

2. D341100 - Solar powered barricade light

3. D341099 - Solar powered barricade light

4. 4973190 - Barrel and barrel base

5. 4859983 - Plastic barricade

6. 4782783 - Traffic channelizer mountable vertical panel

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as of
1/2/2026
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