Patent JPS523284A successfully refreshed from Google Patents.
JPS523284A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Light bulb having two-step filament
Assignee: Individual
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Filing: 1975-06-24
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Granted: —
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Expires: 1995-06-24
Abstract
Abstract PURPOSE: To provide a system of providing a economical easy-manufacturing light bulb of no necessity to replace a new bulb when a filament is burnt out during its use nor losing its function during replacement. COPYRIGHT: (C)1977,JPO&Japio
Inventors
- 👤 Mamoru Honda
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-11-04 11:57
CPC Classifications
—
Claims Analysis
Total Claims: 0
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