Inventor

KIYAMA MASAKAZU

JP2 patents

Patents

2 patents

US9980041B2May 22, 2018

Acoustic system

NIPPON SHEET GLASS ENV AMENITY CO LTD7 citations76

US9915066B2Mar 13, 2018

Sound absorbing panel and soundproof wall equipment

NIPPON SHEET GLASS ENV AMENITY CO LTD0 citations38