Charles Robertson
10Patents
4h-index
2Co-inventors
50Inventor score
Filing activity: Jan 16, 1986 → Dec 14, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5176522A | Erasable marker board assembly | Performing Operations; Transporting | 66 | Expired |
| USD410250S | Marker board | General | 23 | Expired |
| USD480428S1 | Frameless cork board | General | 22 | Expired |
| US4646593A | Looped strap wrench for rotating cylindrical objects | Performing Operations; Transporting | 4 | Expired |
| US10948278B2 | Calibrating a magnetic sensor | Physics | 2 | Active |
| US10883812B2 | Calibrating a magnetic transmitter | Physics | 2 | Active |
| US11678773B2 | Folding shower seat | Human Necessities | 1 | Active |
| USD965998S1 | Folding shower seat | General | 1 | Active |
| US11493318B2 | Calibrating a magnetic transmitter | General | 0 | Revoked |
| US11604057B2 | Calibrating a magnetic transmitter | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.