Growing community of inventors

Grand Rapids, MI, United States of America

Robert C Caldwell, Jr

Average Co-Inventor Count = 4.29

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 = 30

Robert C Caldwell, JrGardner Klaasen (3 patents)Robert C Caldwell, JrCharles B Carter (3 patents)Robert C Caldwell, JrDavid Kersjes (3 patents)Robert C Caldwell, JrDavid Carl Swenson (1 patent)Robert C Caldwell, JrRobert C Caldwell, Jr (3 patents)Gardner KlaasenGardner Klaasen (9 patents)Charles B CarterCharles B Carter (3 patents)David KersjesDavid Kersjes (3 patents)David Carl SwensonDavid Carl Swenson (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Harbor Steel & Supply Corporation (3 from 5 patents)


3 patents:

1. 6830159 - File cabinet container

2. 6588865 - Carrousel file cabinet

3. 6419332 - File cabinet

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as of
1/8/2026
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