DK

Douglas L. Krivanek

HI Hallmark Cards, Incorporated: 1 patents #5 of 16Top 35%
📍 Lenexa, KS: #23 of 45 inventorsTop 55%
🗺 Kansas: #386 of 1,241 inventorsTop 35%
Overall (2019): #483,197 of 560,194Top 90%
1
Patents 2019

Issued Patents 2019

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10352553 Apparatus for producing light and sound Jason Blake Penrod, Ivan B. Helmirch, Christopher J. Shields 2019-07-16