Growing community of inventors

Holland, OH, United States of America

John L Sigmund

Average Co-Inventor Count = 1.46

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 = 91

John L SigmundThomas Charles Gilbert (2 patents)John L SigmundJacob J Huskins (2 patents)John L SigmundRobert Douglas Spaans (2 patents)John L SigmundEric Baczuk (1 patent)John L SigmundMelvin Saunders (1 patent)John L SigmundRobert W Jennings (1 patent)John L SigmundJeffery V Miller (1 patent)John L SigmundEric A Baczuk (1 patent)John L SigmundJohn L Sigmund (10 patents)Thomas Charles GilbertThomas Charles Gilbert (23 patents)Jacob J HuskinsJacob J Huskins (2 patents)Robert Douglas SpaansRobert Douglas Spaans (2 patents)Eric BaczukEric Baczuk (15 patents)Melvin SaundersMelvin Saunders (8 patents)Robert W JenningsRobert W Jennings (1 patent)Jeffery V MillerJeffery V Miller (1 patent)Eric A BaczukEric A Baczuk (16 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Certainteed Corporation (7 from 936 patents)

2. Comfort Line Ltd. (2 from 2 patents)

3. Milgard Manufacturing, Inc. (1 from 75 patents)


10 patents:

1. 8353138 - Window frame with hidden weep

2. 8028475 - Highly ventilated soffit with obscured ventilation openings

3. 7597771 - Pultrusion method and related article

4. 7594362 - Highly ventilated soffit with obscured ventilation openings

5. 7518060 - Prefabricated structural member having a wire routing system

6. D561915 - Soffit panel with short holes

7. D529626 - Vent for a soffit panel with side openings

8. D523967 - Vent for a soffit panel with top openings

9. D515708 - Vent for a soffit panel with short top holes

10. 6941707 - Vented soffit panel

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as of
12/21/2025
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