John Andrew Buchanan
32Patents
11h-index
42Co-inventors
75Inventor score
Filing activity: Jun 30, 1980 → Feb 2, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6459876B1 | Toner cartridge | Physics | 38 | Expired |
| US6496662B1 | Optical toner low sensor | Physics | 38 | Expired |
| US6487383B2 | Dynamic end-seal for toner development unit | Physics | 28 | Expired |
| USD759154S1 | Laser printer toner cartridge | General | 26 | Active |
| US9031451B2 | Toner cartridge having a shutter lock mechanism | Physics | 20 | Active |
| USD759156S1 | Laser printer toner cartridge | General | 19 | Active |
| US7503890B2 | Collapsible patient isolation pod | Human Necessities | 19 | Active |
| USD759155S1 | Laser printer toner cartridge | General | 17 | Active |
| USD759157S1 | Laser printer toner cartridge | General | 17 | Active |
| US6871031B2 | Coupling mechanism for a two piece printer cartridge | Physics | 15 | Expired |
| US9845912B2 | Gang charger, shroud, and dock for portable electronic devices | Electricity | 12 | Active |
| US9164425B2 | Toner cartridge having loading and latching features | Physics | 11 | Active |
| US4409809A | Dual motion press | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6078771A | Low friction doctor blade | Physics | 11 | Expired |
| US8132277B2 | Emergency response treatment bed system | Human Necessities | 11 | Active |
| US9104141B2 | Toner cartridge having a shutter with bypassing actuation | Physics | 10 | Active |
| US8873996B1 | Toner system for an image forming device including a toner cartridge having a shutter with bypassing actuation | Physics | 8 | Active |
| USD552658S1 | Portable camera support | General | 7 | Expired |
| US9152083B2 | Carriage assembly for toner cartridge loading and latching | Physics | 7 | Active |
| US8649710B2 | Toner cartridge having a pivoting exit port cover | Physics | 6 | Active |
| US4334204A | Proximity switch assembly | Electricity | 5 | Expired |
| US8879964B1 | Toner cartridge having an angled exit port surface | Physics | 4 | Active |
| US11459800B2 | Package wrap | Fixed Constructions | 4 | Active |
| USRE47166E1 | Toner cartridge having loading and latching features | General | 2 | Active |
| US8867968B2 | Movable toner port cover member for a replaceable unit of an imaging device | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.