Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8339270 | Electrical ground protection device, circuit tester and method of circuit condition detection | Arthur Silverman | 2012-12-25 |
| 7935192 | Drain cleaning apparatus with restricted reverse function | David Silverman, Michael W. Silverman | 2011-05-03 |