Bruce A. Hillukka

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Hanover, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Ergonomic extendable/retractable ladder
- Patent number 8,387,753
- Issue date Mar 5, 2013
- Core Distribution, Inc.
- Mitchell I. Kieffer
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Telescoping ladder rung
- Patent number D593685
- Issue date Jun 2, 2009
- Core Distribution, Inc.
- Mitchell I. Kieffer
- D25 - Building units and construction elements

Patents Applicationslast 30 patents

Information Patent Application
ERGONOMIC EXTENDABLE/RETRACTABLE LADDER
- Publication number 20080000723
- Publication date Jan 3, 2008
- Mitchell I. Kieffer
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS