Isao Asano

AC Alps Electric Co.: 14 patents #83 of 2,177Top 4%

HO Hochiki: 7 patents #15 of 161Top 10%

SO Sony: 5 patents #7,785 of 25,231Top 35%

BA Babcock-Hitachi: 3 patents #89 of 415Top 25%

AC Alps Alpine Co.: 2 patents #150 of 525Top 30%

Ricoh Company: 1 patents #6,936 of 9,818Top 75%

Overall (All Time): #138,212 of 4,157,543Top 4%

Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #	Title	Co-Inventors	Date
4504729	Three o'clock welding method in narrow groove	—	1985-03-12
4254322	Narrow weld-groove welding process and apparatus therefor	—	1981-03-03
4188526	Narrow weld-groove welding process	—	1980-02-12