Growing community of inventors

Holland, MI, United States of America

John F Hart

Average Co-Inventor Count = 1.00

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 = 82

John F HartJohn F Hart (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Big Dutchman, Inc. (3 from 5 patents)


3 patents:

1. 5964184 - Continuous operating distribution hopper

2. 5794562 - Poultry breeder pan feeding system and pan feeder assembly therefor

3. 5406907 - Controlled pan feeder system for poultry

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as of
12/19/2025
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