US Patent No: 8,131,308
Number of patents in Portfolio can not be more than 2000
Active-call intercom-enabled cordless telephone
Stats
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Mar 6, 2012
Issued date -
Feb 7, 2001
filing date -
09/777,889
serial no -
In Force
status
Importance
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Abstract
A method of using an intercom on a cordless telephone during an active call. The active call is put on hold while the intercom is in use. Once the call is re-activated, the intercom is shut off. This system may be designed for a cordless telephone with one handset or a plurality of handsets.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,640,987 Cordless telephone | 35 | 1985 | |
| 4,650,931 Cordless telephone | 23 | 1985 | |
| 5,014,295 Multi-channel access cordless telephone system | 21 | 1989 | |
| 5,926,766 Cordless telephone with division of channels into groups of channels | 6 | 1995 | |
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| 4,962,524 Cordless telephone apparatus and a method of controlling same | 13 | 1988 | |
| 5,140,628 Radio telephone system control method | 19 | 1989 | |
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| 6,128,504 Apparatus and method of contention resolution for a plurality of handset units in a cordless telephone system | 20 | 1997 | |
| 6,349,213 Apparatus for enhanced voice quality in multiple cordless handset environment and method | 3 | 1999 | |
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| 5,463,659 Apparatus and method of configuring a cordless telephone for operating in a frequency hopping system | 36 | 1994 | |
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| 2007/0149,188 Cordless telephone system and method of connecting the same with interrupting caller | 8 | 2006 | |
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| 4,731,814 Computer-controlled cordless telephone | 63 | 1986 | |
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| 4,882,746 Cordless telephone system | 32 | 1988 | |
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| 6,628,768 System and method of responding to an incoming call while conferencing | 20 | 2000 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Sep 6, 2015 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 6, 2019 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 6, 2023 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |