BCN gramophone needle sharpener.
Davey Rollright Thorn needle sharpener
Rockit blade sharpener, 1909
1909
Plastic pencil sharpener, German, DUX
Remington electric shaver/safety razor blade sharpener
Pencil sharpener by Ofrex
Drill sharpening machine
1950
Knife Cleaner and Sharpener, by Spong, c.1900
1900
Razor blade sharpener
"Gem" knife sharpener, c.1928
Circular saw sharpening machine
Knife sharpener for use with `Kit-chen-Kit' electric food mixer
1925-1935