Backhouse/Wynter/Gratze

The Scots Magazine 1817
https://books.google.co.uk/books?id=dFs3AQAAMAAJ&pg=RA2-PA286&lpg=RA2-PA286&dq=%22John+Winter%22+bristol+comb&source=bl&ots=u5XOj2nwOA&sig=ACfU3U2SO6IYdBF6ckGt_z94jedjcAEmww&hl=en&sa=X&ved=2ahUKEwiusdWF_djnAhVWXRUIHfeaCvwQ6AEwAXoECAoQAQ#v=onepage&q=%22John%20Winter%22%20bristol%20comb&f=false
Also https://books.google.co.uk/books?id=IOqx2xJCu44C&pg=PA118&lpg=PA118&dq=%22John+Winter%22+bristol+comb&source=bl&ots=gsEvcxtIno&sig=ACfU3U2tSgVnFwYxYos8tGlRG_kXihtlFQ&hl=en&sa=X&ved=2ahUKEwiusdWF_djnAhVWXRUIHfeaCvwQ6AEwA3oECAgQAQ#v=onepage&q=%22John%20Winter%22%20bristol%20comb&f=false
List of patents includes:
JOHN WINTER the younger, of Bristol, comb-maker, for a method of joining and combining horn and tortoiseshell together, by means of heat and pressure, thereb causing the same to adhere the one to the other in such manner as to have the appearance of solid tortoise-shell, and with all the strength and elasticity of horn, by which he will be enabled to manufacture and vend the several articles of hair combs, and ornamental and other combs, and snuff boxes, made of those materials, at a cheap rate, and resembling nad having all the appearance and beauty of real tortoiseshell.
March 18

London Gazette
"Partnership between John Winter, Henry Stephen Winter and Edward Winter (Comb and Lanthorn manufacturers) trading under the firm of John Winter and Sons, was dissolved 1 Jan 1829...."