Howlett; David J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Howlett; David J..The latest application filed is for "valve system and method for aerosol delivery".
- Howlett; David J. - Norfolk GB
- Howlett; David J. - Grimston GB
| Patent | Date |
|---|---|
| Valve system and method for aerosol delivery Grant 7,146,977 - Beavis , et al. December 12, 2 | 2006-12-12 |
| Valve system and method for aerosol delivery App 20050066963 - Beavis, Russell ; et al. | 2005-03-31 |
| Dispensing apparatus for metered quantities of pressurised fluid Grant 4,896,832 - Howlett January 30, 1 | 1990-01-30 |
| Collapsible chamber metering valve Grant 4,858,790 - Howlett August 22, 1 | 1989-08-22 |
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