Inventor

SERA AKIO

JP3 patents

Patents

3 patents

US4929903AMay 29, 1990

Method of and apparatus for assessing insulation conditions

MITSUI PETROCHEMICAL IND37 citations87

US5117191AMay 26, 1992

Apparatus for monitoring degradation of insulation of electrical installation

MITSUI PETROCHEMICAL IND38 citations86

US4897561AJan 30, 1990

Apparatus for and method of discriminating signals

MITSUI PETROCHEMICAL IND8 citations68