David Howlett
16Patents
10h-index
5Co-inventors
61Inventor score
Filing activity: Oct 23, 1987 → Sep 25, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4896832A | Dispensing apparatus for metered quantities of pressurised fluid | Human Necessities | 157 | Expired |
| US6062214A | Inhaler for medicament | Human Necessities | 83 | Expired |
| US7146977B2 | Valve system and method for aerosol delivery | Physics | 73 | Expired |
| US5860416A | Inhalers | Human Necessities | 22 | Expired |
| US6354290B1 | Inhalation apparatus | Human Necessities | 21 | Expired |
| US5896853A | Controlled flow inhalers | Human Necessities | 21 | Expired |
| US6336455B1 | Relating to dispensing apparatus | Human Necessities | 20 | Expired |
| US5037013A | Dispensing apparatus for pressurized dispenser containers | Performing Operations; Transporting | 18 | Expired |
| US4858790A | Collapsible chamber metering valve | Performing Operations; Transporting | 13 | Expired |
| US5938085A | Valves for dispensers | Performing Operations; Transporting | 12 | Expired |
| US6341603B1 | Inhalation apparatus | Human Necessities | 10 | Expired |
| US7086571B2 | Valves for pressurized dispensing containers | Performing Operations; Transporting | 10 | Expired |
| US6082355A | Inhalation apparatus | Human Necessities | 7 | Expired |
| US4842495A | Non throttling discharge pump assembly | Performing Operations; Transporting | 5 | Expired |
| US6197280A | Pharmaceutical compositions and devices for their administration | Human Necessities | 2 | Expired |
| US6170482A | Inhalation apparatus | Human Necessities | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.