Growing community of inventors

Vancouver, WA, United States of America

Doug Hargreaves

Average Co-Inventor Count = 1.00

ph-index = 7

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 = 290

Doug HargreavesDoug Hargreaves (11 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. IP Holdings, Inc. (6 from 266 patents)

2. Hgci, Inc. (4 from 126 patents)


11 patents:

1. D1029337 - Light fixture

2. D908944 - Light fixture

3. D854232 - Modular portable hanger

4. D853624 - Corner adapter

5. D791999 - Horticulture grow light housing

6. D786475 - Ballast

7. D786492 - Modular portable light hanger

8. 9468288 - Light hanger

9. D756016 - Horticulture grow light housing

10. D725820 - Ballast frame

11. D698074 - External ballast frame

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as of
1/4/2026
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