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

Patent Owner(s)

Patent Owner	Address
SCHEEPSWERF EN MACHINEFABRIEK DE LIESBOSCH B V A COMPANY OF THE NETHERLANDS	NIEUWEGEIN
BALLAST-NEDAM GROEP N V A COMPANY OF THE NETHERLANDS	AMSTERDAMSE BALLAST BAGGER EN GROND (AMSTERDAM BALLAST DREDGING) B V AMSTELVEEN

International Classification(s)

• E02F:DREDGING; SOIL-SHIFTING

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
de, Witt Bartholomeus M	Amsterdam, NL	1	10
Goedegebuure, Gerard W H	Amstelveen, NL	1	10
Veltman, Constantius H M	Safat, KW	1	10
Wolters, Tjako A	Zeist, NL	7	48

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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: 4418484

Method of dredging and dredging implement

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