Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6327832 | Shearing reinforcement for flat ceilings and dowel strip A flat ceiling includes a reinforcement for resisting shear forces. The reinforcement is arranged in a bearing area for the flat ceiling and includes several dowel strips arranged in a substantially radial position with respect to a ceiling support. The r... | 12/11/2001 |
| 6312185 | Tension rod anchor having a sealing structure A rod anchor is threadedly connected to a tension rod. The rod anchor includes an anchor head having a threaded first bore hole formed therein, and a sealing nut attached to the anchor head in sealing relationship therewith. The sealing member forms a sec... | 11/06/2001 |