Growing community of inventors

Oak Lawn, IL, United States of America

Ward J Gieffers

Average Co-Inventor Count = 1.67

ph-index = 4

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 = 377

Ward J GieffersJoseph F Bader (2 patents)Ward J GieffersDennis J Hilburger (2 patents)Ward J GieffersMichael Benner (2 patents)Ward J GieffersKent Allen Kekeis (2 patents)Ward J GieffersWard J Gieffers (4 patents)Joseph F BaderJoseph F Bader (11 patents)Dennis J HilburgerDennis J Hilburger (4 patents)Michael BennerMichael Benner (4 patents)Kent Allen KekeisKent Allen Kekeis (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Federal Signal Corporation (4 from 161 patents)


4 patents:

1. 6100791 - Programmable emergency signalling device and system

2. 5557257 - Programmable emergency signalling system for a vehicle

3. 5422623 - Programmable emergency signalling device and system

4. 5296840 - Programmable emergency signalling system for a vehicle

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as of
12/16/2025
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