Assignee
MICHAEL RALPH L
US·3 granted patents·15 citations·filing 2010–2013
Technology mixA62B3
Top patents by PatentIndex Score
3 records- 0174US8167090B2Apparatus for safely lowering user from structureMICHAEL RALPH L·Filed 2010·Granted May 1, 2012·8 cites·14 claims
- 0269US8534420B1Apparatus and method for safely lowering user from structureMICHAEL RALPH L·Filed 2012·Granted Sep 17, 2013·5 cites·19 claims
- 0357US8695759B1Apparatus and method for safely lowering user from structure with track-actuated hydraulic brakesMICHAEL RALPH L·Filed 2013·Granted Apr 15, 2014·2 cites·13 claims
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