Company Names, addresses, dates:
  Emil Kleps, 412 R St. NW, Washington DC (1888-1890)
  Daniel E. Kleps, 412 R St. NW, Washington DC (1891-1894, 1898)
  Daniel E. Kleps & Co, 412 R St. NW, Washington DC (1895)
  D.E. Kleps & Co, NJ Ave corner R St. NW, Washington DC (1896)
  D.E. Kleps, R St. corner NJ Ave NW, Washington DC (1897)
  Daniel E. Kleps & Co, 3030 14th St. NW, Washington DC (1899)
  D.E. Kleps & Co, 3130 14th St. NW, Washington DC (1900)
  Daniel E. Kleps, 1626 7th St. NW, Washington DC (1900-1902)

Notes:
Daniel E. Kleps was born 1861 in Germany according to the 1900 census. He is listed in city directories under grocers. I couldn't find any listings for him at the exact address that is on the bottle, but the last address listed above (1626 7th Street NW) appears to be on the corner of Rhode Island avenue & 7th street, which matches the address on the bottle.

Bottles:

book # 351 Sun-colored-Amethyst 9.5" crown top bottle embossed: oval slugplate: D.E. KLEPS / RHODE ISLAND AVE. / & / 7TH ST. N.W. / WASHINGTON, D.C. front below slugplate: REGISTERED back: THIS BOTTLE NOT TO BE SOLD