Glass ink with pen (sic.) RD 300519, registered by Charles Harris, Ford Street, Hockley, Birmingham, Warwickshire, on 13 May 1876 - Parcel 3. Class 3 : glass.
The design representation clearly describes the design as for a 'glass ink with pen rack combined'.
Ford Street, Hockley, Birmingham (postcode B18 5PL) has been completely redeveloped with modern housing.
"Ford Street consisted of a row of houses on one side and factories on the other side. The houses were 2 up and 2 down [back-to-back terraces] and the toilet was outside. At the top end of the street was the tram station. During the war, Birmingham was repeatedly bombed by the Germans ... and there were several direct hits by bombs on Ford Street."
http://www.francisfrith.com/birmingham/2up-and-2down_memory-162861 No glaringly obvious genealogical match to Charles Harris, but this may be a lead:
1871 census: at Birmingham - Charles Harris ,
GLASS MOULDER, (34, head of household, b. Yardley, Worcestershire), with his wife, Eliza (28, b. Wordsley, Staffs.), his sister -in law, Harriet Hanke (30, b. Wordsley), and Francis Hanke (0, b. Wordsley - Harriet Hanke's son).
Interestingly, Charles' wife was born in Wordsley, in the heart of the Stourbridge glass industry.
Christening of Albert Harris, son of Charles and Eliza Harris, 18 June 1876, Birmingham.
Christening of Herbert Harris, son of Charles and Eliza Harris, 23 February 1879, Birmingham.
Christening of William Harris, son of Charles and Eliza Harris, 16 October 1887, Birmingham.
Fred.