Angus John North
89Patents
9h-index
56Co-inventors
81Inventor score
Filing activity: Nov 23, 2002 → May 9, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6672710B1 | Thermal ink jet printhead with symmetric bubble formation | Performing Operations; Transporting | 45 | Expired |
| US6719406B1 | Ink jet printhead with conformally coated heater | Performing Operations; Transporting | 30 | Expired |
| US6692108B1 | High efficiency thermal ink jet printhead | Performing Operations; Transporting | 29 | Expired |
| US7101025B2 | Printhead integrated circuit having heater elements with high surface area | Performing Operations; Transporting | 23 | Expired |
| US7264335B2 | Ink jet printhead with conformally coated heater | Performing Operations; Transporting | 19 | Expired |
| US6755509B2 | Thermal ink jet printhead with suspended beam heater | Performing Operations; Transporting | 18 | Expired |
| US7513607B2 | Inkjet nozzle arrangement with annular heater element | Performing Operations; Transporting | 12 | Active |
| US8272708B2 | Printhead with individual nozzle firing frequency at least once per decap time | Performing Operations; Transporting | 12 | Active |
| US7416284B2 | Inkjet unit cell with dual heater elements | Performing Operations; Transporting | 9 | Active |
| US7429097B2 | Thermal ink jet printhead with symmetric bubble formation | Performing Operations; Transporting | 9 | Expired |
| US7604321B2 | Thermal inkjet printhead with de-clog firing mode | Performing Operations; Transporting | 9 | Active |
| US8011748B2 | Inkjet printhead with variable drive pulse | Performing Operations; Transporting | 9 | Active |
| US7722168B2 | Inkjet printhead incorporating coincident groups of ink apertures | Performing Operations; Transporting | 8 | Active |
| US7328978B2 | Printhead heaters with short pulse time | Performing Operations; Transporting | 7 | Active |
| US7128400B1 | Very high efficiency thermal ink jet printhead | Performing Operations; Transporting | 6 | Expired |
| US7147306B2 | Printhead nozzle with reduced ink inertia and viscous drag | Performing Operations; Transporting | 6 | Expired |
| US7611218B2 | Inkjet printhead that prints keep-wet dots to avoid clogging | Performing Operations; Transporting | 6 | Active |
| US7246876B2 | Inkjet printhead for printing with low density keep-wet dots | Performing Operations; Transporting | 5 | Expired |
| US7086719B2 | Inkjet printhead heater with high surface area | Performing Operations; Transporting | 5 | Expired |
| US8356885B2 | MEMS fluid sensor | Performing Operations; Transporting | 4 | Active |
| US7448729B2 | Inkjet printhead heater elements with thin or non-existent coatings | Performing Operations; Transporting | 4 | Expired |
| US7491911B2 | MEMS bubble generator for large stable vapor bubbles | Performing Operations; Transporting | 4 | Active |
| US7377623B2 | Printhead heaters with a nanocrystalline composite structure | Performing Operations; Transporting | 4 | Expired |
| US7637593B2 | Printhead with low viscous drag droplet ejection | Performing Operations; Transporting | 3 | Active |
| US7798608B2 | Printhead assembly incorporating a pair of aligned groups of ink holes | Performing Operations; Transporting | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.