Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8387713 | Aeration device | David R. Maas | 2013-03-05 |
| 8220557 | Aeration device | David R. Maas | 2012-07-17 |
| 8079422 | Soil aerator assembly | David R. Maas | 2011-12-20 |
| 8028758 | Aeration device | David R. Maas | 2011-10-04 |
| 7931094 | Aeration device | David R. Maas | 2011-04-26 |
| 7926582 | Soil aeration device | David R. Maas | 2011-04-19 |
| 7896095 | Soil aerator | David R. Maas | 2011-03-01 |
| 7784557 | Soil aeration device | David R. Maas | 2010-08-31 |
| 7779929 | Soil aerator assembly | David R. Maas | 2010-08-24 |
| 7743841 | Aeration device | David R. Maas | 2010-06-29 |
| 7717188 | Soil aerator | David R. Maas | 2010-05-18 |
| 7669666 | Aeration device | David R. Maas | 2010-03-02 |
| 7640994 | Arcuate aeration tine | David R. Maas | 2010-01-05 |
| 7575063 | Aerating a ground surface | David R. Maas | 2009-08-18 |
| 7575064 | Soil aeration device | David R. Maas | 2009-08-18 |
| 7451831 | Soil aerator | David R. Maas | 2008-11-18 |
| 7438136 | Aeration device | David R. Maas | 2008-10-21 |
| 7341115 | Soil aerator assembly | David R. Maas | 2008-03-11 |
| 7290619 | Soil aeration device | David R. Maas | 2007-11-06 |
| 7204317 | Aerating a ground surface | David R. Maas | 2007-04-17 |
| 7152691 | Arcuate aeration tine | David R. Maas | 2006-12-26 |
| 7096968 | Aeration device | David R. Maas | 2006-08-29 |
| 7070005 | Soil aerator assembly | David R. Maas | 2006-07-04 |
| 7055617 | Soil aerator | David R. Maas | 2006-06-06 |
| 6983806 | Aeration device | — | 2006-01-10 |