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

Patent Owner(s)

Patent Owner	Address
FRABA INC	14 WASHINGTON ROAD BLDG 6 PRINCETON JUNCTION NJ 08550

International Classification(s)

• H01J:ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Schmidt, Christoph	Lawrenceville, NJ	106	1207
# of filed Patents : 106 Total Citations : 1207

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Patent Citation Ranking

• 2 Citation Count
• H01J Class

• 3.19 % this patent is cited more than
• 18 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: 7157689

Optical edge sensing system with signal authentication

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Abstract

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An optical safety edge and control system functions correctly despite changes in ambient conditions and/or deformation of the sensor. The optical safety edge and control system automatically compensates for changes in ambient conditions and/or deformation, thus providing a simple easy to use edge sensor which reduces false responses and system failures.

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Description

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