DG

Douglas H. Graham

RO Rollerblade: 6 patents #5 of 42Top 15%
JD John Deere: 1 patents #2,957 of 5,518Top 55%
Overall (All Time): #725,356 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10300898 Cart and implement combination having a brake system Mandar M. Kale, Trond A. Svidal, Derryn W. Pikesh 2019-05-28
D358626 Ribbed brake pad for a roller skate Paul G. Moldenhauer 1995-05-23
D357962 Ribbed brake pad for a roller skate Paul G. Moldenhauer 1995-05-02
D334225 Long blade roller skate 1993-03-23
D327565 Sport boot 1992-07-07
D327360 Ventilated boot 1992-06-30
D323540 Roller skate 1992-01-28