Growing community of inventors

Darien, CT, United States of America

David H Douglas

Average Co-Inventor Count = 5.00

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 = 71

David H DouglasAndrew Stephen Van Luchene (3 patents)David H DouglasRaymond Jay Mueller (3 patents)David H DouglasGeorge M Marrazzo (3 patents)David H DouglasShane J Wahlquist (2 patents)David H DouglasShane Whalquist (1 patent)David H DouglasDavid H Douglas (3 patents)Andrew Stephen Van LucheneAndrew Stephen Van Luchene (166 patents)Raymond Jay MuellerRaymond Jay Mueller (14 patents)George M MarrazzoGeorge M Marrazzo (3 patents)Shane J WahlquistShane J Wahlquist (2 patents)Shane WhalquistShane Whalquist (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Walker Digital, LLC (3 from 532 patents)


3 patents:

1. 8533003 - Method and apparatus for selecting a supplemental product to offer for sale during a transaction

2. 8103520 - Method and apparatus for selecting a supplemental product to offer for sale during a transaction

3. 7542919 - Method and apparatus for selecting a supplemental product to offer for sale during a transaction

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as of
12/15/2025
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