Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7234460 | Metering valve for a metered dose inhaler providing consistent delivery | David J. Greenleaf, Peter D. Hodson, Graham R. Purkins, Gary Mahon | 2007-06-26 |
| 4919680 | High-extraction chrome tanning process | Bernhard Wehling, Bernd Makowka, Gertrud A. Klein, Helga Rosentreter | 1990-04-24 |