Patents on electric lighting

http://www.tfcbooks.com/mall/more/307lpa.htm

• US335,786 -  Electric Arc Lamp - Filed March 30, 1885

• US335,787 - Electric Arc Lamp - Filed July 13, 1885

• US447,920 - Method of Operating Arc Lamps - Filed October 1, 1890

• US454,622 -  System of Electric Lighting - Filed April 25, 1891

• US455,069 - Electric Incandescent Lamp - Filed May 14, 1891

• US514,170 -  Incandescent Electric Light - Filed january 2, 1892