Invention Grant
- Patent Title: Sound recording apparatus
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Application No.: US16388737Application Date: 1937-09-15
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Publication No.: US2174226APublication Date: 1939-09-26
- Inventor: GOLDMAN ISIDORE H
- Applicant: GOLDMAN ISIDORE H
- Assignee: Isidore H Goldman
- Current Assignee: Isidore H Goldman
- Priority: US16388737 1937-09-15
- Main IPC: G11B3/36
- IPC: G11B3/36
Public/Granted literature
- US10734710B1 Electronic devices with antenna arrays Public/Granted day:2020-08-04
Information query
IPC分类:
