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David D. Apfel
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Attica, MI, US
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last 30 patents
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Patent Grant
Expandable pre-formed plug
Patent number
7,011,315
Issue date
Mar 14, 2006
L&L Products, Inc.
Michael J. Czaplicki
B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Patent Grant
Expandable pre-formed plug
Patent number
6,422,575
Issue date
Jul 23, 2002
L&L Products, Inc.
Michael J. Czaplicki
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Patents Applications
last 30 patents
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Patent Application
Expandable pre-formed plug
Publication number
20020096833
Publication date
Jul 25, 2002
L&L Products, Inc.
Michael J. Czaplicki
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL