Growing community of inventors

Sigourney, IA, United States of America

Fred H Lucas

Average Co-Inventor Count = 3.00

ph-index = 3

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 = 40

Fred H Lucas ↔ Ivan Ray Brand (2 patents)Fred H Lucas ↔ Jeff Alan Fleenor (2 patents)Fred H Lucas ↔ Thomas Dean Ogle (2 patents)Fred H Lucas ↔ Duane A Harthoorn (1 patent)Fred H LucasFred H Lucas (3 patents)Ivan Ray BrandIvan Ray Brand (16 patents)Jeff Alan FleenorJeff Alan Fleenor (6 patents)Thomas Dean OgleThomas Dean Ogle (3 patents)Duane A HarthoornDuane A Harthoorn (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Vermeer Manufacturing Company, Inc. (2 from 470 patents)


3 patents:

1. 6412715 - Method for decreasing the likelihood of an object being thrown from a tub grinder

2. D452294 - Hydraulic fluid tank

3. 5950942 - Tub grinder

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as of
1/21/2026
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