Invention Grant
- Patent Title: Fire-door-releasing device.
- Patent Title (中): 防火门装置。
-
Application No.: US1906305473Application Date: 1906-03-12
-
Publication No.: US893047APublication Date: 1908-07-14
- Inventor: WISE JESSE V
- Applicant: RICHARDS MFG COMPANY
- Assignee: Richards Mfg Company
- Current Assignee: Richards Mfg Company
- Priority: US1906305473 1906-03-12
Information query
