August 1938 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 August 1938
DIAMONDSCOPE
Filed: August 27, 1938
ILLUMINATING APPARATUS FOR DISCLOSING DEFECTS OF PRECIOUS STONES THROUGH THE AGENCY OF CONCENTRATED LIGHT
Owned by: AMERICAN GEM SOCIETY
Serial Number: 71410056
ALKACID
Filed: August 5, 1938
PAPER STRIPS USED IN MAKING APPROXIMATE DETERMINATIONS OF HYDROGEN ION CONCENTRATION IN LIQUIDS
Owned by: FISHER SCIENTIFIC COMPANY
Serial Number: 71409265
