AH

Alvin J. Halfaker

📍 Grand Rapids, MN: #2 of 7 inventorsTop 30%
🗺 Minnesota: #1,470 of 7,373 inventorsTop 20%
Overall (2019): #194,949 of 560,194Top 35%
2
Patents 2019

Issued Patents 2019

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
10507138 Noise reduction earmuffs system and method 2019-12-17
10299962 Noise reduction earmuffs system and method 2019-05-28