Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| D619767 | Dental floss dispenser case with a mirror surface | 07/13/2010 |
| D619352 | Case for interdental brushes | 07/13/2010 |
| 7424952 | Interdental brush package An interdental brush package comprises a plurality of interdental brushes, each having a handle and bristles connected to the handle; a container; the container including a pocket disposed at a bottom portion thereof; and the container including a backing extending ... | 09/16/2008 |
| D536529 | Interdental brush | 02/13/2007 |
| D532159 | Dental floss holder | 11/14/2006 |