Invention Grant
- Patent Title: Apparatus for measuring the hardness of a material
- Patent Title (中): 用于测量材料硬度的装置
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Application No.: US18489662Application Date: 1962-04-03
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Publication No.: US3119255APublication Date: 1964-01-28
- Inventor: KAZUHIKO AKASHI , MISAO MASHIMO
- Applicant: AKASHI SEISAKUSHO KK
- Assignee: Akashi Seisakusho Kk
- Current Assignee: Akashi Seisakusho Kk
- Priority: JP3119255X 1961-08-30
- Main IPC: G01N3/44
- IPC: G01N3/44
Public/Granted literature
- US20240168296A1 Waveguide-Based Displays with Tint Layer Public/Granted day:2024-05-23
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