March 1921 Environmental control apparatus Trademarks by day
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| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 | 31 |
Environmental control apparatus Trademarks filed in March 1921
LOXON
Filed: March 21, 1921
Electric-Lamp Guards
Owned by: McGill Manufacturing Company, Inc.
Serial Number: 71145025
