CH

Charles D. Helmholdt

HM Haworth Mfg.: 4 patents #3 of 9Top 35%
📍 Kentwood, MI: #40 of 319 inventorsTop 15%
🗺 Michigan: #15,670 of 86,293 inventorsTop 20%
Overall (All Time): #895,002 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
4746021 Window shelf assembly Diane E. Helmholdt 1988-05-24
D295478 Reconfigurable shelf unit Diane E. Helmholdt 1988-05-03
D277143 Chair 1985-01-15
D276575 Chair 1984-12-04
D276576 Chair 1984-12-04
D276481 Chair 1984-11-27