DC

David M. Chenal

JH Jmj Holdings: 14 patents #1 of 1Top 100%
📍 Frederic, WI: #1 of 8 inventorsTop 15%
🗺 Wisconsin: #3,173 of 40,088 inventorsTop 8%
Overall (All Time): #332,075 of 4,157,543Top 8%
14
Patents All Time

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDate
12250511 Apparatus and method for tuned-frequency-spectrum earpiece 2025-03-11
D1066643 Earpiece 2025-03-11
12250523 Apparatus and method for an earpiece 2025-03-11
D1045393 Earpiece-foam sizing tool 2024-10-08
12047732 Tuned-frequency-spectrum earpiece 2024-07-23
11826231 Earpiece-foam sizing apparatus and method 2023-11-28
D985753 Earpiece assembly 2023-05-09
D964547 Earpiece device assembly 2022-09-20
D959670 Earpiece-foam sizing tool 2022-08-02
D952831 Earpiece apparatus 2022-05-24
11229552 Apparatus and method for an earpiece device 2022-01-25
11179273 Sound-attenuation system 2021-11-23
10940043 Sound attenuation apparatus and method 2021-03-09
9603746 Sound attenuation 2017-03-28