The strange symbol is the London import mark and 925= sterling, the last mark is difficult to make out but could be an 'L' from 1926-7 which would seem to concur with the style of the comb/case. Best wishes, Mike.
Thank you Mike!
I was able to trace the patent number to Emrich G.m.b.H. - a German company. The patent has been UK registered in 1926, which is in compliance with your date (1926-27).