CA489110A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Self-pressuring ink reservoir for ball-pointed writing implements
Assignee: WA Sheaffer Pen Co
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Filing: —
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Granted: 1952-12-23
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Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
- 👤 K. Reiman Clarence
- 👤 Knobel Max
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-23 05:30
CPC Classifications
—
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References Cited (Backward Citations)
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