Jack Spencer
13Patents
6h-index
9Co-inventors
59Inventor score
Filing activity: Mar 16, 1981 → Nov 9, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4401158A | One trip multi-zone gravel packing apparatus | Fixed Constructions | 63 | Expired |
| US5568729A | Machine and method for making hardened confections having complementary parts joined in a unit | Human Necessities | 51 | Expired |
| US6223949A | Spinning valve | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4431058A | Wash tool method for subterranean wells | Fixed Constructions | 12 | Expired |
| US7226039B2 | Hoist assembly for a motor vehicle spare tire | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7487953B2 | Hoist assembly for a motor vehicle spare tire | Emerging Cross-Sectional Technologies | 8 | Active |
| US6591977B2 | Conveyor and packaging apparatus and packaging conveyance and packaging methods | Human Necessities | 4 | Expired |
| US6016639A | Ice cream sandwich wrapping apparatus having a friction member | Performing Operations; Transporting | 3 | Expired |
| US10071831B1 | Ice cream sandwich cartoner | Performing Operations; Transporting | 2 | Active |
| US6478139B1 | Conveyor and packaging apparatus and packaging conveyance and packaging methods | Human Necessities | 1 | Expired |
| US9199747B2 | Ice cream sandwich apparatus | Performing Operations; Transporting | 0 | Active |
| US7874130B2 | Ice cream sandwich-making machine | Performing Operations; Transporting | 0 | Active |
| US10010096B2 | Ice cream sandwich apparatus | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.