October 1931 Electrical and scientific apparatus Trademarks by day
| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Electrical and scientific apparatus Trademarks filed in October 1931
SENTINEL
Filed: October 23, 1931
RADIO RECEIVING SETS AND PARTS THEREOF, RADIO TUBES AND LOUD SPEAKERS
Owned by: UNITED AIR CLEANER CORPORATION
Serial Number: 71320383
HYDROMATIC
Filed: October 16, 1931
ELECTRIC CONTROL DEVICES FOR HYDRAULIC ELEVATORS
Owned by: F. ROSENBERG ELEVATOR COMPANY
Serial Number: 71320132
WIDESITE
Filed: October 9, 1931
LENSES FOR EYEGLASSES AND SPECTACLES
Owned by: SHURON OPTICAL COMPANY, INC.
Serial Number: 71319910
PHOTRONIC
Filed: October 1, 1931
LIGHT SENSITIVE CELLS
Owned by: WESTON ELECTRICAL INSTRUMENT CORPORATION
Serial Number: 71319629
