Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D563808 | I-beam spirit level | Amy Levinson | 2008-03-11 |
| 7290346 | Extension set for spirit levels | Emanuel Szumer, Stephen Sweet | 2007-11-06 |
| D546214 | I-beam spirit level | Amy Levinson | 2007-07-10 |