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H04M 1/312

Pulses produced by electronic circuits

Official title: {pulses produced by electronic circuits}

H04M1/312 (Pulses produced by electronic circuits) appears on 54 US grants and 2 published applications in this corpus.

Search patents in H04M

Granted patents: 54
Published applications: 2
Assignees: 32
Inventors: 78
Latest grant: 17 Mar 2020

Filings by year

H04M 1/312: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	7	0
1977	3	0
1978	1	0
1979	1	0
1980	2	0
1981	3	0
1982	2	0
1983	3	0
1984	1	0
1985	5	0
1986	1	0
1987	2	0
1988	6	0
1989	3	0
1990	1	0
1991	0	0
1992	2	0
1993	0	0
1994	3	0
1995	4	0
1996	0	0
1997	1	0
1998	0	0
1999	1	0
2000	0	0
2001	0	0
2002	0	0
2003	0	0
2004	0	0
2005	0	0
2006	0	0
2007	0	0
2008	0	0
2009	0	0
2010	0	1
2011	0	0
2012	1	0
2013	0	0
2014	0	0
2015	0	0
2016	0	0
2017	0	0
2018	0	0
2019	0	1
2020	1	0

By publication year. Applications have been published since 2001.

Recent patents

Electric circuit arrangement and a method for generating electric current pulses to a load17 Mar 2020US 10,594,318 B2City University of Hong Kong
Plus code dialing in a mobile device1 May 2012US 8,170,551 B2Verizon Patent and Licensing Inc.
Off-hook signal and dial pulse generating circuit and a method for driving the same circuit10 Aug 1999US 5,937,030 AOki Electric Industry Co., Ltd.
Device for limiting the working voltage for mechanical switches in telephony11 Feb 1997US 5,602,914 ASGS-Thomson Microelectronics S.A.
Device for limiting the working voltage mechanical switches in telephony5 Sep 1995US 5,448,636 ASGS-Thomson Microelectronics S.A.

Most cited

By later US patents