SIGMA Trademark
SIGMA is a USPTO trademark filed by SIGMA INSTRUMENTS, INCORPORATED. Status: Expired.
Trademark Facts
| Mark | SIGMA |
|---|---|
| Serial Number | 71590106 |
| Registration Number | 0536253 |
| Status | Expired |
| Filing Date | 1949-12-29 |
| Registration Date | 1951-01-09 |
| Mark Type | Combined |
| Nice Classes | 009 (Electronics & Software), 021 (Housewares) |
| Owner | SIGMA INSTRUMENTS, INCORPORATED |
| Prosecution Events | 2 |
| Latest Event | EXRG on 1992-11-03 |
Goods & Services
ELECTRICAL RELAYS [ AND ACOUSTIC SWITCHES]