JPH01172761U - - Google Patents

Info

Publication number

JPH01172761U

JPH01172761U JP6845588U JP6845588U JPH01172761U JP H01172761 U JPH01172761 U JP H01172761U JP 6845588 U JP6845588 U JP 6845588U JP 6845588 U JP6845588 U JP 6845588U JP H01172761 U JPH01172761 U JP H01172761U

Authority

JP

Japan

Prior art keywords

telephone

telephone line

hook

switching

switching means

Prior art date

1988-05-24

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000001514 detection method Methods 0.000 claims description 3
• 238000010586 diagram Methods 0.000 description 1