Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 7900612 | Valve and cylinder head cover for crankcase ventilation of an internal combustion engine A valve for crankcase ventilation of an internal combustion engine comprises a fresh-air side for connection with an intake section of the internal combustion engine, an engine side for connection with the crankcase and a valve insert movable as a whole for changing... | 03/08/2011 |
| 7842115 | Oil separator arrangement and cylinder head cover for an internal combustion engine An oil separator arrangement for an internal combustion engine incorporates a vortex chamber oil separator with a vortex chamber extending in a longitudinal direction, where the vortex chamber includes a wall extending in a longitudinal direction, a gas inlet, and a... | 11/30/2010 |
| 7594501 | Cylinder head cover for an internal combustion engine A cylinder head cover for an internal combustion engine includes an oil separator with a vortex chamber extending in a longitudinal direction from a proximal end to a distal end. Said vortex chamber comprises an essentially pipe-shaped wall extending in said longitu... | 09/29/2009 |
| 7080636 | Oil separating device for a combustion engine An oil separating device for an internal combustion engine connected in a flow path of blow-by gas, loaded with oil particles, from the crankcase to the inlet manifold section of the internal combustion engine and comprising an oil separator formed with at least one... | 07/25/2006 |