Check Out PATENTS FOR INVENTIONS: ABRIDGMENTS OF SPECIFICATIONS IN THE SERIES NUMBERED 155,801-244,800: CLASS 39(i) ELECTRIC LAMPS, ARC AND INCANDESCENT-ARC, AND VACUUM OR LOW-PRESSURE APPARATUS FOR ELECTRIC DISCHARGES THROUGH GASES OR VAPOURS: (1921-25).

PATENTS FOR INVENTIONS: ABRIDGMENTS OF SPECIFICATIONS IN THE SERIES NUMBERED 155,801-244,800: CLASS 39(i) ELECTRIC LAMPS, ARC AND INCANDESCENT-ARC, AND VACUUM OR LOW-PRESSURE APPARATUS FOR ELECTRIC DISCHARGES THROUGH GASES OR VAPOURS: (1921-25). Best

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