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

Patent Owner(s)

Patent Owner	Address
WERNER TECHNOLOGIES INC	1105 NORTH MARKET STREET SUITE 1300 WILMINGTON DE 19899

International Classification(s)

• 2504:STEPS, LADDERS AND SCAFFOLDS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bartnicki, Frederick J	Greenville, PA	13	249
Bell, Randall	River Forest, IL	19	450
Dylik, John J	LaGrange, IL	4	59
Hand, James	Glen Ellyn, IL	14	235
Heald, Edward E	Greenville, PA	9	107

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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: D413990

Front face of a ladder top

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