Invention Grant
- Patent Title: Expansible cartridge
- Patent Title (中): 可扩展墨盒
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Application No.: US31734940Application Date: 1940-02-05
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Publication No.: US2296947APublication Date: 1942-09-29
- Inventor: PIERCE ROBERT C
- Applicant: NAT STANDARD CO
- Assignee: Nat Standard Co
- Current Assignee: Nat Standard Co
- Priority: US31734940 1940-02-05
- Main IPC: F42B3/00
- IPC: F42B3/00 ; F42D1/20
Information query
