December 1940 Environmental control 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 |
Environmental control apparatus Trademarks filed in December 1940
DX
Filed: December 12, 1940
Apparatus for Producing a Gas for Use as a Special Atmosphere in Industrial Heating Furnaces
Owned by: SURFACE COMBUSTION, INC.
Serial Number: 71438777
SC
Filed: December 12, 1940
Furnaces Used in the Industrial Arts
Owned by: SURFACE COMBUSTION, INC.
Serial Number: 71438780
WATLOW
Filed: December 2, 1940
Electrical Equipment-, namely, Heating Units, Heating Elements, Heaters, [ Rheostats, ] Resistors, Switches, Contactors,…
Owned by: Watlow Electric Manufacturing Company
Serial Number: 71438461
