Growing community of inventors

Inver Grove Heights, MN, United States of America

Steve J McHenry

Average Co-Inventor Count = 5.00

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 = 148

Steve J McHenryPaul C Freeberg (2 patents)Steve J McHenryGordon M Melby (2 patents)Steve J McHenryTimothy J Nicholson (2 patents)Steve J McHenryJohn P Nicholson (2 patents)Steve J McHenrySteve J McHenry (2 patents)Paul C FreebergPaul C Freeberg (43 patents)Gordon M MelbyGordon M Melby (6 patents)Timothy J NicholsonTimothy J Nicholson (6 patents)John P NicholsonJohn P Nicholson (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Addco, Inc. (2 from 4 patents)


2 patents:

1. 6414650 - Sign system with field changeable screen size and message

2. 6150996 - Changeable message sign system with reconfigurable sign screen

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as of
12/20/2025
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