Growing community of inventors

Waverly, IA, United States of America

Douglas C Madsen

Average Co-Inventor Count = 3.00

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 = 21

Douglas C MadsenGeoffrey M Glass (3 patents)Douglas C MadsenWayne J Brocka (3 patents)Douglas C MadsenDouglas C Madsen (3 patents)Geoffrey M GlassGeoffrey M Glass (12 patents)Wayne J BrockaWayne J Brocka (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Plasticade Products Corporation (2 from 3 patents)

2. Plasticide Products Corporation (1 from 1 patent)


3 patents:

1. 6561120 - Plastic barricade assembly

2. 6101967 - Plastic barricade assembly

3. 5570972 - Traffic barricade and flasher light assembly with combination flasher

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as of
12/19/2025
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