What is Hiram Percy Maxim famous for "inventing"?

The firearm silencer

The ARRL

The indoor toilet

Choices 1 and 2


Answer: Choices 1 and 2



The people who answered it right were:

F. Art Nocker
VE4AJO El
K7CW
dick
Livinna Traylor
KX0R
OM2KW


Thanks to everyone who gave it a try.