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

Patent Owner(s)

Patent Owner	Address
LEARNING RESOURCES INC	380 NORTH FAIRWAY DRIVE VERNON HILLS IL 60061

International Classification(s)

• G09B:EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCE....

• 1994 Application Filing Year
• G09B Class
• 251 Applications Filed
• 100 Patents Issued To-Date
• 39.85 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hoffman, Lisa	102 N. Maple St., Mt. Prospect, IL 60056	4	27
# of filed Patents : 4 Total Citations : 27
Woldenberg, Richard	176 Hastings, Highland Park, IL 60035	6	54
# of filed Patents : 6 Total Citations : 54

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Patent Citation Ranking

• 12 Citation Count
• G09B Class

• 53.38 % this patent is cited more than
• 28 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: 5597308

Assembly including interlocking components for teaching mathematical concepts

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Abstract

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An assembly for teaching mathematical concepts includes a plurality of interlocking components, each having at least one connecting end so that the components can be combined in any order or length. Each component is assigned a mathematical value according to its length, and this value may be indicated by indicia on its face or by color coding. A base is also provided for retaining the columns of components in vertical formations. Means are provided on the platform of the base for engaging the bottom component in each column.

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Description

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Claims

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Claims data not available

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Legal Events

 

• AS2014
• REMI2008
• FPAY2008
• AS�2006
• FPAY2004
• FEPP2003
• FPAY2000
• I1997
• STCF1996
• F1994
• PD1994
• AS1994

Date	Code	Event	Description
Oct 09, 2014	AS	ASSIGNMENT	free format text: SECURITY INTEREST;ASSIGNOR:LEARNING RESOURCES, INC.;REEL/FRAME:033965/0244 Owner name: JPMORGAN CHASE BANK, N.A., ILLINOIS Effective Date: Oct 09, 2014
Aug 04, 2008	REMI	MAINTENANCE FEE REMINDER MAILED
Jul 28, 2008	FPAY	FEE PAYMENT	year of fee payment: 12
Oct 16, 2006	AS�	SECURITY INTEREST	free format text: SECURITY AGREEMENT;ASSIGNOR:LEARNING RESOURCES, INC.;REEL/FRAME:018471/0176 Owner name: J.P. MORGAN CHASE BANK NATIONAL ASSOCIATION,ILLINO Effective Date: Oct 16, 2006 free format text: SECURITY AGREEMENT;ASSIGNOR:LEARNING RESOURCES, INC.;REEL/FRAME:018471/0176 Owner name: J.P. MORGAN CHASE BANK NATIONAL ASSOCIATION, ILLIN Effective Date: Oct 16, 2006
Jul 28, 2004	FPAY	FEE PAYMENT	year of fee payment: 8
Dec 08, 2003	FEPP	FEE PAYMENT PROCEDURE	free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY
Jul 18, 2000	FPAY	FEE PAYMENT	year of fee payment: 4
Jan 28, 1997	I	Issuance
Dec 23, 1996	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Nov 16, 1994	F	Filing
Nov 16, 1994	PD	Priority Date
Nov 15, 1994	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WOLDENBERG, RICHARD;HOFFMAN, LISA;REEL/FRAME:007300/0091 Owner name: LEARNING RESOURCES, INC., ILLINOIS Effective Date: Nov 15, 1994