January 1934 Nonmetallic building materials Trademarks by day
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| 1 | 2 | 3 | 4 | 5 | 6 | |
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| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
Nonmetallic building materials Trademarks filed in January 1934
PENCHLOR
Filed: January 13, 1934
SELF-HARDENING, ACID-PROOF CONSTRUCTION CEMENTS
Owned by: PEN-CHLOR, INC.
Serial Number: 71346009
