SH

Shoji Hirayama

HK Hirayama Setsubi Kabushiki Kaisha: 1 patents #1 of 1Top 100%
Overall (1989): #7,253 of 140,708Top 6%
3
Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4873914 Clean room system and unit for the same clean room system — 1989-10-17
4854224 Air cleaning apparatus and construction of clean room with the same — 1989-08-08
4841847 Air cleaning apparatus and construction of clean room with the same — 1989-06-27