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

Patent Owner(s)

Patent Owner	Address
TWISTHINK L L C	130 CENTRAL AVENUE SUITE 400 HOLLAND MI 49423-2852

International Classification(s)

• 2502:PREFABRICATED OR PRE-ASSEMBLED BUILDING PARTS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hummel, Benjamin P	Rockford, US	12	282
Van, Faasen Joel Graham	Holland, US	27	219

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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: D635689

Window frame

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