H04K 1/006
Secret communication: by varying or inverting the phase, at periodic or random
Official title: {by varying or inverting the phase, at periodic or random intervals}
H04K1/006 (Secret communication: by varying or inverting the phase, at periodic or random) appears on 51 US grants and 38 published applications in this corpus.
Search patents in H04K- Granted patents
- 51
- Published applications
- 38
- Assignees
- 47
- Inventors
- 124
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 3 | 3 |
| 2011 | 2 | 2 |
| 2012 | 1 | 0 |
| 2013 | 2 | 2 |
| 2014 | 4 | 1 |
| 2015 | 2 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 3 |
| 2018 | 0 | 1 |
| 2019 | 3 | 1 |
| 2020 | 2 | 4 |
| 2021 | 3 | 3 |
| 2022 | 1 | 3 |
| 2023 | 5 | 3 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Interference management for array puncturing21 Apr 2026US 12,609,750 B2QUALCOMM Incorporated
- Secure NOMA method based on physical layer security17 Feb 2026US 12,556,237 B2
- Operating method of electronic apparatus for transmitting signal and electronic apparatus supporting the same2 Dec 2025US 12,489,543 B2Agency for Defense Development
- Method, transmitter device and receiver device for securing channel training on a power domain non-orthogonal multiple access system20 Aug 2024US 12,069,472 B2Instituto De TelecomunicaçõEs
- Random phase modulation method depending on communication distance23 Jan 2024US 11,881,932 B2University of Electronic Science and Technology of China
- Interference management for array puncturing21 Aug 2025US 2025/0266894 A1QUALCOMM Incorporated
- A secure noma method based on physical layer security22 Feb 2024US 2024/0063849 A1Istanbul Medipol Universitesi
- Random phase modulation method depending on communication distance28 Dec 2023US 2023/0421284 A1University of Electronic Science and Technology of China
- Operating method of electronic apparatus for transmitting signal and electronic apparatus supporting the same21 Sep 2023US 2023/0299868 A1Agency for Defense Development
- System and method for transmitting a data stream in a network15 Jun 2023US 2023/0188568 A1AT&T Intellectual Property I, L. P.
Most cited
By later US patents
- Noiselike amplitude and phase modulation coding for spread spectrum transmissions61US 4,308,617 AThe Bendix Corporation · 1981
- Enhanced encryption method and system for ultra secure applications40US 7,831,049 B1Nucrypt LLC · 2010
- Optical encryption interface35US 5,793,871 ACalifornia Institute of Technology · 1998
- Communication32US 4,351,064 AWestinghouse Electric Corp. · 1982
- Secure communication by encryption/decryption of vector at PSK modulation/detection stage23US 5,838,797 ANEC Corporation · 1998