DK

Douglas L. Krivanek

HI Hallmark Cards, Incorporated: 1 patents #4 of 20Top 20%
📍 Lenexa, KS: #9 of 48 inventorsTop 20%
🗺 Kansas: #313 of 1,157 inventorsTop 30%
Overall (2022): #470,595 of 548,613Top 90%
1
Patents 2022

Issued Patents 2022

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11499706 Apparatus for producing light and sound Jason Blake Penrod, Ivan B. Helmrich, Christopher J. Shields 2022-11-15