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

Patent Owner(s)

• STEELCASE INC.

International Classification(s)

• 1906:MATERIALS AND INSTRUMENTS FOR WRITING BY HAND, FOR....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Kong, Duck Young	Grand Rapids, US	73	729
Oberwelz, Elger	San Francisco, US	86	1924
Overthun, Thomas	San Francisco, US	132	2340

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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: D669531

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