Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9403702 | Commodity water purifier | Arthur F. Johnston | 2016-08-02 |
| 7427409 | Broad spectrum antimicrobial purification materials and methods for purifying fluids | Jan W. Gooch, Arthur F. Johnston | 2008-09-23 |
| 6957743 | Microbiological water filter | Arthur F. Johnston, Frank A. Williams, Kenneth D. Hughes | 2005-10-25 |
| 6187192 | Microbiological water filter | Arthur F. Johnston, Frank A. Williams, Kenneth D. Hughes | 2001-02-13 |
| 6180016 | Microbiological water filtering | Arthur F. Johnston, Frank A. Williams, Kenneth D. Hughes | 2001-01-30 |
| 5552046 | Multi-stage microbiological water filter | Arthur F. Johnston | 1996-09-03 |