Assignee

SAKAMOTO TAKAO

JP2 patents

Top patents by PatentIndex Score

US4750547AJun 14, 1988

Method for cleaning inner surfaces of heat-transfer tubes in a heat-exchanger

SAKAMOTO TAKAO42 citations91

US8750554B2Jun 10, 2014

Speaker diaphragm and speaker device

SAKAMOTO TAKAO4 citations71