Invention Grant
- Patent Title: Electric signal bell
- Patent Title (中): 电信号钟
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Application No.: US15484426Application Date: 1926-12-14
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Publication No.: US1749175APublication Date: 1930-03-04
- Inventor: FRANK ALBRIGHT , WILLIAM ELSASSER
- Applicant: STANLEY & PATTERSON INC
- Assignee: Stanley & Patterson Inc
- Current Assignee: Stanley & Patterson Inc
- Priority: US15484426 1926-12-14
- Main IPC: G10K1/064
- IPC: G10K1/064
Public/Granted literature
- US10798180B1 Systems and methods for optimizing information collaboration Public/Granted day:2020-10-06
Information query
