Invention Grant
- Patent Title: Tracer
- Patent Title (中): 示踪剂
-
Application No.: US50589055Application Date: 1955-05-04
-
Publication No.: US2838268APublication Date: 1958-06-10
- Inventor: RYCKMAN GEORGE E
- Applicant: RYCKMAN GEORGE E
- Assignee: George E Ryckman
- Current Assignee: George E Ryckman
- Priority: US50589055 1955-05-04
- Main IPC: B23Q35/36
- IPC: B23Q35/36
Information query
IPC分类:
