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

Patent Owner(s)

Patent Owner	Address
TOMAR ELECTRONICS INC	2100 W OBISPO AVENUE GILBERT ARIZONA 85233 85233

International Classification(s)

• H05B:ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE ....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Sikora, Scott T	Mesa, AZ	26	296
# of filed Patents : 26 Total Citations : 296

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Patent Citation Ranking

• 8 Citation Count
• H05B Class

• 0 % this patent is cited more than
• 35 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: 4954753

Strobe flash lamp power supply with input voltage feedthrough afterflow prevention circuit

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Abstract

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The DC to DC converter includes a coupled inductor having a primary winding and a feedback winding. A drive current regulator circuit receives a variable input voltage from the feedback winding but transmits a constant base drive current to the base terminal of the converter switching transistor. The base drive regulator circuit thereby enables the DC to DC converter to operate at high levels of efficiency over wide ranges of DC input voltages such as twelve to forty-eight volts DC.

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Description

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Claims

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Legal Events

 

• STCH2018
• FP1994
• LAPS1994
• REMI1994
• FEPP1992
• I1990
• F1988
• PD1985

Date	Code	Event	Description
Jan 29, 2018	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Sep 07, 1994	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Sep 07, 1994
Sep 04, 1994	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Apr 12, 1994	REMI	MAINTENANCE FEE REMINDER MAILED
Nov 01, 1992	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Sep 04, 1990	I	Issuance
Aug 29, 1988	F	Filing
Nov 04, 1985	PD	Priority Date