H04M 1/665
By checking the validity of a code
Official title: by checking the validity of a code
H04M1/665 (By checking the validity of a code) appears on 167 US grants and 101 published applications in this corpus.
Search patents in H04M- Granted patents
- 167
- Published applications
- 101
- Assignees
- 88
- Inventors
- 254
- Latest grant
- 7 Sep 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 2 |
| 2002 | 4 | 5 |
| 2003 | 4 | 5 |
| 2004 | 3 | 4 |
| 2005 | 2 | 9 |
| 2006 | 3 | 7 |
| 2007 | 3 | 9 |
| 2008 | 3 | 7 |
| 2009 | 2 | 5 |
| 2010 | 6 | 6 |
| 2011 | 0 | 4 |
| 2012 | 5 | 2 |
| 2013 | 11 | 8 |
| 2014 | 7 | 4 |
| 2015 | 2 | 5 |
| 2016 | 4 | 4 |
| 2017 | 7 | 7 |
| 2018 | 5 | 2 |
| 2019 | 4 | 1 |
| 2020 | 1 | 1 |
| 2021 | 4 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for selectively accepting phone calls and text messages7 Sep 2021US 11,115,523 B2
- Signal detection and blocking for voice processing equipment29 Jun 2021US 11,049,108 B2Semafone Limited
- PIN or secret-code based caller-id validation system13 Apr 2021US 10,979,561 B1
- System for providing a called party with identity verification of the calling party23 Mar 2021US 10,958,774 B1Bank of America Corporation
- Call authentication system and method for blocking unwanted calls12 May 2020US 10,652,390 B2
- Signal detection and blocking for voice processing equipment30 Jan 2025US 2025/0037128 A1Sycurio Limited
- Methods and apparatus for placing call using qr code18 May 2023US 2023/0156111 A1Squareping Inc.
- Signal detection and blocking for voice processing equipment24 Mar 2022US 2022/0092603 A1Semafone Limited
- Method for Selectively Accepting Phone Calls and Text Messages6 May 2021US 2021/0136197 A1
- Signal detection and blocking for voice processing equipment9 Jul 2020US 2020/0219107 A1Semafone Limited
Most cited
By later US patents
- Telephone control system with branch routing343US 5,375,161 AAccessLine Technologies, Inc. · 1994
- Device to automatically screen incoming telephone calls, determine the identity of the caller and process the call accordingly232US 4,266,098 A1981
- Telecommunications systems226US 4,578,540 AAT&T Bell Laboratories · 1986
- Remote access telephone control system221US 4,893,335 AFuller Research and Development Company · 1990
- Authenticated communications access service203US 5,181,238 AAT&T Bell Laboratories · 1993