Michael; Ralph L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Michael; Ralph L..The latest application filed is for "apparatus for safely lowering user from structure".
- Michael; Ralph L. - Lake Forest CA
| Patent | Date |
|---|---|
| Apparatus and method for safely lowering user from structure with track-actuated hydraulic brakes Grant 8,695,759 - Michael April 15, 2 | 2014-04-15 |
| Apparatus and method for safely lowering user from structure Grant 8,534,420 - Michael September 17, 2 | 2013-09-17 |
| Apparatus for safely lowering user from structure Grant 8,167,090 - Michael May 1, 2 | 2012-05-01 |
| Apparatus For Safely Lowering User From Structure App 20120061183 - Michael; Ralph L. | 2012-03-15 |
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