DB

Duane M. Beukema

ST Steelcase: 6 patents #162 of 809Top 25%
📍 Grand Rapids, MI: #310 of 1,824 inventorsTop 20%
🗺 Michigan: #15,670 of 86,293 inventorsTop 20%
Overall (All Time): #895,180 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
4776633 Integrated chair and control Glenn A. Knoblock 1988-10-11
4485996 Height adjustor for furniture Jack R. Knoblauch 1984-12-04
4438898 Chain control locking assembly Jack R. Knoblauch, Kenneth W. Hozeski 1984-03-27
4390206 Synchrotilt chair control Frederick S. Faiks, Charles C. Pergler, Ronald L. Whitwam, Jack R. Knoblauch, Kenneth W. Hozeski 1983-06-28
4373692 Chair control with height adjustment actuator Jack R. Knoblauch, Kenneth W. Hozeski 1983-02-15
4324382 Height adjustable chair base Jack R. Knoblauch 1982-04-13