Yoshinobu Koiwa

UN Unknown: 5 patents #3,065 of 83,584Top 4%

Overall (All Time): #1,664,985 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
5035261	Pump and valve apparatus	—	1991-07-30
5026216	Shaft construction method	—	1991-06-25
4948349	Pump and valve apparatus	—	1990-08-14