CONTEST
Competed
Prize
$4,000
$4,000
DEADLINE
This contest is closed.
This contest is closed.
Patent Known References
| Type | Patent Country | Patent Number |
|---|---|---|
| Patent | US | 3170980 |
| Patent | US | 3832029 |
| Patent | US | 3913872 |
| Patent | US | 4045133 |
| Patent | US | 4686519 |
| Patent | US | 4744615 |
| Patent | US | 5029156 |
| Patent | US | 5059013 |
| Patent | US | 5303084 |
| Patent | US | 5602679 |
| Patent | US | 5625738 |
| Patent | US | 5801793 |
| Patent | US | 7688347 |
| Patent | US | 4206494 |
| Patent | US | 4497013 |
| Patent | US | 4735495 |
| Patent | US | 4765718 |
| Patent | US | 4912614 |
| Patent | US | 5146248 |
| Patent | EP | 509630 |
| Patent | US | 4918583 |
| Patent | US | 3170980 |
| Patent | US | 3600568 |
| Patent | US | 4375315 |
| Patent | US | 4423953 |
| Patent | US | 5150138 |
| Patent | US | 5161042 |
| Patent | US | 5098184 |
| Patent | JP | A0545724 |
| Patent | US | 5042921 |
