Patent JPS522206A successfully refreshed from Google Patents.
JPS522206A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Indicator for termination of a telephone call
Assignee: Mitsubishi Electric Corp
•
Filing: 1975-06-24
•
Granted: —
•
Expires: 1995-06-24
Abstract
Abstract PURPOSE:To enable to know easily the termination of a telephone call from the outside even if any device is connected to the telephone set.
Inventors
- 👤 Yoshiaki Doi
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-10-29 01:59
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/82
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
JPS4910604A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.