Robert Watson McAlpine
38Patents
7h-index
50Co-inventors
68Inventor score
Filing activity: Dec 31, 2002 → Nov 17, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6771922B2 | Toner cartridge | Physics | 24 | Expired |
| US9360797B1 | Toner cartridge having a movable projection for providing installation feedback to an image forming device | Physics | 18 | Active |
| US9389582B2 | Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing | Physics | 18 | Active |
| US9519243B2 | Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing | Physics | 16 | Active |
| US9063460B2 | Volumetric toner cartridge having driven toner platform | Physics | 11 | Active |
| US8918032B2 | Volumetric toner cartridge having toner agitators | Physics | 10 | Active |
| USD854078S1 | Toner cartridge | General | 8 | Active |
| US9983506B2 | Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing | Physics | 6 | Active |
| US9335656B2 | Toner level sensing using rotatable magnets having varying angular offset | Physics | 6 | Active |
| US6931224B2 | Toner cartridge hopper with labyrinth channels for releasing air while trapping toner in cartridge | Physics | 6 | Expired |
| US9841722B2 | Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing | Physics | 5 | Active |
| US7231163B2 | Apparatus and method of reducing charge roller contamination | Physics | 4 | Expired |
| US7167672B2 | Method and device for conveying waste toner in an image forming device | Physics | 3 | Expired |
| US9477178B1 | System for determining the open or closed state of a toner cartridge shutter | Physics | 3 | Active |
| US9915894B2 | Electrophotographic image forming device having a toner cartridge that includes a movable projection for providing installation feedback | Physics | 3 | Active |
| US8304066B2 | Toner release coating | Emerging Cross-Sectional Technologies | 2 | Active |
| US9709928B2 | Drive mechanism for an intermediate transfer member module of an electrophotographic imaging device | Physics | 2 | Active |
| US9709925B2 | Toner cartridge having a movable projection for providing installation feedback to an image forming device | Physics | 2 | Active |
| US9488935B1 | Drive mechanism for an intermediate transfer member module of an electrophotographic imaging device | Physics | 2 | Active |
| USD841730S1 | Toner cartridge | General | 2 | Active |
| US10303111B2 | Image forming device having a replaceable unit that includes magnets of varying angular offset for toner level sensing | Physics | 1 | Active |
| US6990308B1 | Image forming device, print cartridge and doctor blade assembly that reduce vibrations at doctoring media nip | Physics | 1 | Expired |
| US8238803B2 | Doctor blade surface energy modification | Physics | 1 | Active |
| US10036981B2 | Toner cartridge having a movable projection for providing installation feedback to an image forming device | Physics | 1 | Active |
| US10884357B2 | Toner cartridge having a movable projection for providing installation feedback to an image forming device | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.