Growing community of inventors

Carmel, IN, United States of America

John B Letts

Average Co-Inventor Count = 2.01

ph-index = 11

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 = 420

John B LettsMichael J Hubbard (12 patents)John B LettsChunhua Yao (10 patents)John B LettsTimothy Tackett (4 patents)John B LettsEdward G Kane (2 patents)John B LettsGregory Brandt (2 patents)John B LettsThomas M Clayton (2 patents)John B LettsGregory Brandt (2 patents)John B LettsJiansheng Tang (1 patent)John B LettsJoseph John Kalwara (1 patent)John B LettsWayne E Laughlin (1 patent)John B LettsJohn W Fieldhouse (1 patent)John B LettsAllen Sopko (1 patent)John B LettsRobert B Williamson (1 patent)John B LettsJohn Geary (1 patent)John B LettsMark Holtman (1 patent)John B LettsRobert C Harrison (1 patent)John B LettsGregory A Brandt (1 patent)John B LettsBruce M Miller (1 patent)John B LettsAllen M Garrett (1 patent)John B LettsJohn B Letts (32 patents)Michael J HubbardMichael J Hubbard (79 patents)Chunhua YaoChunhua Yao (12 patents)Timothy TackettTimothy Tackett (4 patents)Edward G KaneEdward G Kane (5 patents)Gregory BrandtGregory Brandt (2 patents)Thomas M ClaytonThomas M Clayton (2 patents)Gregory BrandtGregory Brandt (3 patents)Jiansheng TangJiansheng Tang (37 patents)Joseph John KalwaraJoseph John Kalwara (27 patents)Wayne E LaughlinWayne E Laughlin (5 patents)John W FieldhouseJohn W Fieldhouse (5 patents)Allen SopkoAllen Sopko (4 patents)Robert B WilliamsonRobert B Williamson (2 patents)John GearyJohn Geary (2 patents)Mark HoltmanMark Holtman (1 patent)Robert C HarrisonRobert C Harrison (1 patent)Gregory A BrandtGregory A Brandt (1 patent)Bruce M MillerBruce M Miller (1 patent)Allen M GarrettAllen M Garrett (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Firestone Building Products Company, LLC (12 from 137 patents)

2. Holcim Technology Ltd (9 from 92 patents)

3. Bridgestone/firestone, Inc. (4 from 342 patents)

4. Bfs Diversified Products, LLC (4 from 74 patents)

5. Other (2 from 832,680 patents)

6. Bridgestone Corporation (1 from 5,118 patents)

7. Gregory Brandt (0 patent)

8. John Letts (0 patent)


32 patents:

1. 12358190 - Process to yield foam construction boards with low surface irregularities

2. 12337581 - Construction boards with foil-containing facers

3. 12305385 - Process for encapsulating fragile insulation materials within polyisocyanurate

4. 12291620 - Isocyanate-based foam construction boards

5. 12263622 - Process for producing isocyanate-based foam construction boards

6. 12006414 - Process for producing isocyanate-based foam construction boards

7. 11999833 - Process for producing isocyanate-based foam construction boards

8. 11913222 - Polyisocyanurate coverboards with improved fire resistance

9. 11618235 - Encapsulated fragile insulation materials

10. 11242681 - Polyisocyanurate coverboards with improved fire resistance

11. 11174364 - Process for producing isocyanate-based foam construction boards

12. 10870987 - Isocyanate-based foam construction boards

13. 10611066 - Process for encapsulating fragile insulation materials within polyisocyanurate

14. 10450741 - Construction boards with coated inorganic facer

15. 10000922 - Construction boards with coated inorganic facer

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as of
12/8/2025
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