Growing community of inventors

Lynnwood, WA, United States of America

David T Littrell

Average Co-Inventor Count = 3.00

ph-index = 2

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 = 136

David T Littrell ↔ James S Birrell (2 patents)David T Littrell ↔ Timothy O Armstrong (1 patent)David T Littrell ↔ Paul D Barker (1 patent)David T LittrellDavid T Littrell (2 patents)James S BirrellJames S Birrell (38 patents)Timothy O ArmstrongTimothy O Armstrong (23 patents)Paul D BarkerPaul D Barker (10 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Precor Incorporated (2 from 190 patents)


2 patents:

1. D410978 - Cross training exerciser

2. D342299 - Recumbent exercise cycle

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as of
12/14/2025
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