April 1922 Nonmetallic building materials Trademarks by day
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| 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 |
Nonmetallic building materials Trademarks filed in April 1922
PYRUMA
Filed: April 3, 1922
FIRE CEMENT
Owned by: CHARLES HERBERT SANKEY
Serial Number: 71161706
