Growing community of inventors

Houston, TX, United States of America

Mark L Welker

Average Co-Inventor Count = 1.11

ph-index = 5

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 = 81

Mark L WelkerRobert M Stearns (1 patent)Mark L WelkerMark L Welker (5 patents)Robert M StearnsRobert M Stearns (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (3 from 833,002 patents)

2. Arcalux Corporation (1 from 1 patent)

3. A/c Research & Technology, Inc. (1 from 1 patent)

4. American Green Technology, Inc. (2 patents)

5. Medical Illumination International Inc. (2 patents)

6. Mark L. Welker (0 patent)


5 patents:

1. 8439517 - Fixture installation apparatus and method

2. 8350228 - Germicidal fixture and methods

3. 7922351 - Fixture

4. 4685308 - Temperature responsive cooling apparatus

5. 4542627 - Cooling apparatus for air conditioner and refrigeration systems

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as of
1/22/2026
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