Kunihiko Koshiishi

HO Hoya: 2 patents #523 of 1,290Top 45%

📍 Yamanashi, JP: #1,094 of 1,957 inventorsTop 60%

Overall (All Time): #2,246,316 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5869211	Phase shift mask blank having a coated central shading pattern and uncoated peripheral portion	—	1999-02-09
5474807	Method for applying or removing coatings at a confined peripheral region of a substrate	—	1995-12-12