Growing community of inventors

Cedarburg, WI, United States of America

Jack E Perko

Average Co-Inventor Count = 3.20

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 = 99

Jack E PerkoGary J Wirth (2 patents)Jack E PerkoBrian A Foxgrover (2 patents)Jack E PerkoFrank Wayne Harris (1 patent)Jack E PerkoClement F Hying (1 patent)Jack E PerkoLarry E Wenzler (1 patent)Jack E PerkoJohn H Kiekhaefer (1 patent)Jack E PerkoJoseph S Hetzer (1 patent)Jack E PerkoJoseph S Hetzer (1 patent)Jack E PerkoJack E Perko (4 patents)Gary J WirthGary J Wirth (14 patents)Brian A FoxgroverBrian A Foxgrover (2 patents)Frank Wayne HarrisFrank Wayne Harris (70 patents)Clement F HyingClement F Hying (9 patents)Larry E WenzlerLarry E Wenzler (3 patents)John H KiekhaeferJohn H Kiekhaefer (2 patents)Joseph S HetzerJoseph S Hetzer (1 patent)Joseph S HetzerJoseph S Hetzer (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. W. H. Brady Co. (3 from 73 patents)

2. Brady Usa, Inc. (1 from 18 patents)


4 patents:

1. 5587043 - Thin label applicator

2. 5066349 - Process for pultruding a composite sign

3. 4935279 - Pultruded composite sign and process therefor

4. 4812343 - Pultruded fiber reinforced plastic marking devices

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as of
1/1/2026
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