The Nipkov disk is a prototype..?
TV
camera
telegraph
turntable
A Nipkow disk is a mechanical, rotating, geometrically operating image scanning device, patented in 1885 by Paul Gottlieb Nipkow. This scanning disk was a fundamental component in mechanical television through the 1920s and 1930s.
reach: rather globalelectronicsinventorssciencetechnology
Answers by country
TV
camera
telegraph
turntable
answers
the Netherlands
21
Greece
23
Australia
24
the United States
70
India
107
France
11
Poland
2271
the United Kingdom
47
Germany
43
Republic of Ireland
13