David E. Campbell
19Patents
8h-index
18Co-inventors
69Inventor score
Filing activity: Sep 9, 1988 → Apr 1, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6512463B1 | Bi-directional protocol | Electricity | 73 | Expired |
| US5733004A | Shoulder belt guide | Emerging Cross-Sectional Technologies | 53 | Expired |
| US4993027A | Method and apparatus for determining microprocessor kernal faults | Physics | 48 | Expired |
| US7499864B2 | Integrated travel industry system | Physics | 24 | Expired |
| US8424964B2 | Child safety seat | Performing Operations; Transporting | 20 | Active |
| USD389286S | Shoulder belt guide | General | 18 | Expired |
| US8226162B2 | Child safety seat | Performing Operations; Transporting | 14 | Active |
| US6304191A | Uni-directional protocol | Physics | 9 | Expired |
| USD666470S1 | Latch for a crib | General | 5 | Active |
| USD732869S1 | Crib | General | 4 | Active |
| US8572775B1 | Crib | Human Necessities | 4 | Active |
| US8613480B1 | Child restraint system | Performing Operations; Transporting | 3 | Active |
| US6060926A | Pulse conditioning circuit | Electricity | 2 | Expired |
| US8745781B1 | Crib | Human Necessities | 2 | Active |
| USD677954S1 | Crib | General | 1 | Active |
| US9380884B2 | Crib | Human Necessities | 1 | Active |
| USD690579S1 | Latch for a crib | General | 1 | Active |
| US10640078B1 | Portable restraining passenger safety harness | Performing Operations; Transporting | 1 | Active |
| US11040694B1 | Portable restraining passenger safety harness | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.