Happy Holidays! Illuminating-Devices for Christmas Trees, Patent 194421, August 21, 1877. Records of the Patent and Trademark Office. National Archives and Records Administration (Page 1) Illuminating-Devices for Christmas Trees, Patent 194421, August 21, 1877. Records of the Patent and Trademark Office. National Archives and Records Administration (Page 2) Illuminating-Devices for Christmas Trees, Patent 194421, August 21, 1877. … Continue reading Patent of the Month: Illuminating-Devices for Christmas Trees
