Company Names, addresses, dates¹:
  Smithson & Mazinger, 349 M SW (1893)
  Smithson & Mazinger, 462 H SW (1894-1897)
  R.T. Mazinger, 462 H SW (1898)
  R.T. Mazinger, 359 M street SW (1899-1915)

Notes:
Richard T. Mazinger was born about 1859 in DC. He's listed in the 1910 Census as working in a Bottling Works. In 1902, he was a Bottler & Wholesale Liquor dealer². William A. Smithson was his partner from 1893-1897.

Bottles:

(enlarge)	This is an 8.8" aqua baltimore-loop bottle marked: front: SMITHSON & MAZINGER / 462 H. ST. S.W. / 1894 / WASHINGTON, D.C. bottom: S&M
(enlarge)	This is a 7.4" aqua hutchinson bottle marked: front: SMITHSON & MAZINGER / 462 H. ST. S.W. / WASHINGTON, D.C. bottom: S&M
(enlarge)	These are 6.5" aqua hutchinson bottles. The one on the left has a baltimore-loop blob, and the one on the right has a normal blob. They're both marked: front: SMITHSON & MAZINGER / WASHINGTON / D.C.
(enlarge)	These are 7.5" clear hutchinson bottles marked: front: R.T. MAZINGER / 359 / M. ST. S.W. / REGISTERED/ 1898 / WASHINGTON, D.C. / AGW
(enlarge)	These 3 crown tops are all BIM. The one on the left is 8.5" clear marked: front: REGISTERED / MAZINGER / 359 [M] ST / BOTTLER / SW / WASHINGTON / DC / THIS BOTTLE / NOT TO BE SOLD The center one is 9.2 aqua marked: front: R.T. MAZINGER / 359 M ST SW / REGISTERED / WASHINGTON DC The right one is 9.5 clear marked: front: MAZINGER / 359 [M] ST / BOTTLER / SW / WASHINGTON / DC / REGISTERED bottom: RTM
(enlarge)	This is a 9.5" aqua crown top bottle marked: front: R.T. MAZINGER / 462 H. ST. S.W. / REGD / 1898 / WASHINGTON, D.C. back: THIS BOTTLE NEVER SOLD
(enlarge)	This is an 8" sun-colored-amethyst crown top bottle marked: front: R.T. MAZINGER / 359 / M. ST. S.W. / WASHINGTON, D.C. / THIS BOTTLE NEVER SOLD back: REGISTERED