AH

Alvin J. Halfaker

📍 Grand Rapids, MN: #10 of 61 inventorsTop 20%
🗺 Minnesota: #11,810 of 52,454 inventorsTop 25%
Overall (All Time): #825,726 of 4,157,543Top 20%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
11135094 Noise reduction earmuffs system and method 2021-10-05
10786394 Noise reduction earmuffs system and method 2020-09-29
10507138 Noise reduction earmuffs system and method 2019-12-17
10299962 Noise reduction earmuffs system and method 2019-05-28
10149786 Noise reduction earmuffs system and method 2018-12-11
8429766 Helmet with embedded sound suppression ear cups 2013-04-30