Growing community of inventors

Foothill Ranch, CA, United States of America

Mark A Longfellow

Average Co-Inventor Count = 4.44

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 = 41

Mark A Longfellow ↔ Norman C Tracy (2 patents)Mark A Longfellow ↔ Jon B Miller (2 patents)Mark A Longfellow ↔ Norman L Hill (2 patents)Mark A Longfellow ↔ Thomas Nieto (1 patent)Mark A LongfellowMark A Longfellow (2 patents)Norman C TracyNorman C Tracy (6 patents)Jon B MillerJon B Miller (5 patents)Norman L HillNorman L Hill (4 patents)Thomas NietoThomas Nieto (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Custom Building Products, Inc. (2 from 15 patents)


2 patents:

1. 7370384 - Combination wedge and notch trowel with reversible grip handle

2. D557578 - Notch trowel

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as of
1/19/2026
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