JK

Joseph P. Keller

3M: 2 patents #280 of 1,428Top 20%
📍 Hankinson, ND: #1 of 5 inventorsTop 20%
🗺 North Dakota: #34 of 233 inventorsTop 15%
Overall (2019): #157,109 of 560,194Top 30%
2
Patents 2019

Issued Patents 2019

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
10398406 One piece stethoscope diaphragm Dean E. Sitz, Mary Jo Johnson 2019-09-03
10213181 Stethoscope diaphragm Mary Jo Johnson, Dean E. Sitz 2019-02-26