James A. Duncan
21Patents
12h-index
12Co-inventors
78Inventor score
Filing activity: Mar 31, 1992 → Oct 29, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5910072A | Exercise apparatus | Human Necessities | 116 | Expired |
| US6689019B2 | Exercise machine | Human Necessities | 103 | Expired |
| US5354248A | Exercise apparatus | Human Necessities | 72 | Expired |
| US5499959A | Upper body exercise apparatus | Human Necessities | 51 | Expired |
| US8182001B2 | Direct action window lock | Emerging Cross-Sectional Technologies | 33 | Active |
| US5312313A | Device to prevent binding of a guidance system for an upper body exercise apparatus | Human Necessities | 25 | Expired |
| US7341542B2 | Exercise machine | Human Necessities | 25 | Expired |
| US7942787B2 | Exercise machine | Human Necessities | 16 | Active |
| USD355684S | Exercise machine | General | 16 | Expired |
| US5565002A | Exercise apparatus | Human Necessities | 16 | Expired |
| USD357953S | Exercise cycle | General | 16 | Expired |
| US7632219B2 | Exercise machine | Human Necessities | 14 | Active |
| US8899632B2 | Direct action window lock | Emerging Cross-Sectional Technologies | 10 | Active |
| USD373805S | Exercise apparatus | General | 9 | Expired |
| US8323155B2 | Exercise machine | Human Necessities | 9 | Active |
| USD381717S | Handle for an exercise apparatus | General | 6 | Expired |
| US8858403B2 | Exercise machine | Human Necessities | 5 | Active |
| US9272182B2 | Exercise machine | Human Necessities | 5 | Active |
| US10201727B2 | Exercise machine | Human Necessities | 3 | Active |
| US10145148B2 | Direct action window lock | Emerging Cross-Sectional Technologies | 1 | Active |
| US11041326B2 | Direct action window lock | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.