Patent JPS5338905A successfully refreshed from Google Patents.
JPS5338905A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
System for controlling extension of key telephone set
Assignee: NEC Platforms Ltd
•
Filing: 1977-05-31
•
Granted: —
•
Expires: 1997-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ii Kaaman Sutetsufuen
- 👤 Fumio Tsutsumi
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-11-08 04:26
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.