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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
FAIRCHILD COMMUNICATIONS SERVICES COMPANY	300 WEST SERVICE ROAD CHANTILLY VA 22021

International Classification(s)

• H03M:CODING, DECODING OR CODE CONVERSION, IN GENERAL

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Flanagin, Stephen D	Santa Monica, CA	18	1133
# of filed Patents : 18 Total Citations : 1133
Gord, John C	Venice, CA	54	18141
# of filed Patents : 54 Total Citations : 18141

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Patent Citation Ranking

• 10 Citation Count
• H03M Class

• 0 % this patent is cited more than
• 38 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
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

Full Text

US Patent No: 4646322

Adaptive delta modulation codec

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Abstract

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An ADM codec includes CVSD encoder and decoder circuitry having a syllabic filter responsive to the binary state of the ADM bit samples for changing the quantization step amplitude at a rate of change directly proportional to the rate of change of slope of the received voice signal.

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Description

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Claims

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Legal Events

 

• STCH2018
• FP1995
• LAPS1995
• AS1994
• REMI1994
• AS1993
• FPAY1990
• AS1990
• AS1990
• FEPP1989
• AS1988
• I1987
• AS1985
• F1983
• AS1983

Date	Code	Event	Description
Jan 23, 2018	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Mar 01, 1995	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Mar 01, 1995
Feb 26, 1995	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Nov 18, 1994	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JWP TELECOM, INC.;REEL/FRAME:007235/0070 Owner name: FAIRCHILD COMMUNICATIONS SERVICES COMPANY, VIRGINI Effective Date: Nov 23, 1994 free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TELENOVA, INC.;REEL/FRAME:007235/0233 Owner name: JWP TELECOM, INC., NEW JERSEY Effective Date: Nov 18, 1994
Oct 04, 1994	REMI	MAINTENANCE FEE REMINDER MAILED
Jun 07, 1993	AS	ASSIGNMENT	free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CONGRESS FINANCIAL CORPORATION;REEL/FRAME:006559/0871 Owner name: TELENOVA, INC., NEW JERSEY Effective Date: Jun 07, 1993
Jun 11, 1990	FPAY	FEE PAYMENT	year of fee payment: 4
Feb 09, 1990	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TELENOVA, INC.;REEL/FRAME:005311/0763 Owner name: CONGRESS FINANCIAL CORPORATION, NEW YORK Effective Date: Feb 09, 1990
Feb 05, 1990	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MEMOREX TELEX CORPORATION;REEL/FRAME:005262/0362 Owner name: TELENOVA, INC., 102 COOPER COURT, LOS GATOS, CA 95 Effective Date: Feb 05, 1990
Dec 06, 1989	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Jun 28, 1988	AS	ASSIGNMENT	free format text: MERGER;ASSIGNOR:KALMIA ASSOCIATES CORPORATION AND TELEX COMPUTER PRODUCTS (MERGED INTO);REEL/FRAME:005029/0358 Owner name: MEMOREX TELEX CORPORATION, A CORP. OF DE. Effective Date: Jun 28, 1988
Feb 24, 1987	I	Issuance
Dec 23, 1985	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNITED TECHNOLOGIES CORPORATION;REEL/FRAME:004609/0654 Owner name: TELEX COMPUTER PRODUCTS, INC., TULSA, OK A CORP OF Effective Date: Dec 23, 1985 free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNITED TECHNOLOGIES CORPORATION;REEL/FRAME:004609/0654 Owner name: TELEX COMPUTER PRODUCTS, INC., TULSA, OK A CORP OF Effective Date: Dec 23, 1985
Dec 19, 1983	F	Filing
Dec 19, 1983	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FLANAGIN, STEPHEN D.;GORD, JOHN C.;REEL/FRAME:004216/0265;SIGNING DATES FROM 19831208 TO 19831209 Owner name: UNITED TECHNOLOGIES CORPORATION HARTFORD, CT A CO