WC

William Callahan

Overall (All Time): #1,123,414 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
11680927 Dual layer circuit board for sensors on a pipeline inspection tool Arthur K. Fox, Calvin L. Simmons, Michael P. Sheffield 2023-06-20
11579119 Radial springs on sensor arms of pipeline inspection tool Arthur K. Fox 2023-02-14
6491275 Computer accessory having assemblage of mouse pad and paper pad Kenneth R. Goodman 2002-12-10
4645227 Pintle bracket 1987-02-24