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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6543388 | Ergonomic handle for grooming brush A brush handle is formed with a continuously arched upper surface portion and a lower surface portion separated into two arched portions by a humped semi-circular ridge. One of the lower arched portions forms a trigger grip for a single finger held in eit... | 04/08/2003 |
| 6330956 | Molded plastic pet bowl A molded plastic bowl is formed with a non-slip molded base. Venting is provided during molding of the base to the pre-formed bowl to allow molding gasses to escape the base molding cavity. Venting can be provided through the floor of the bowl, along its ... | 12/18/2001 |
| 6213055 | Ergonomic handle for grooming brush A brush handle is formed with a continuously arched upper surface portion and a lower surface portion separated into two arched portions by a humped semi-circular ridge. One of the lower arched portions forms a trigger grip for a single finger held in eit... | 04/10/2001 |
