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Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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| Number | Title | Issue Date |
| 6212965 | Shiftable clamping-type locking mechanism A shiftable clamping-type locking mechanism, includes two track-defining elements and a plurality of clamping members, e.g. rollers or balls, arranged between the tracks of the elements and so spring-biased as to seek a clamped position. The clamping memb... | 04/10/2001 |
| 5136946 | Clamping device for an axially displaceable adjusting member for changing-over a gripper on a gripper cylinder of a sheet-fed rotary printing machine In a sheet-fed rotary printing machine having a sheet-turning device including a gripper cylinder and an adjusting member extending in axial direction of and axially displaceable on the gripper cylinder for changing-over a gripper on the gripping cylinder... | 08/11/1992 |
| 4679453 | Apparatus for producing stepwise movement An apparatus for providing stepwise movement along an elongated stepped member. A holder contains at least one button that includes a pivotally mounted claw disposed to engage the stepped member when the button is depressed. The claw pivots upon engagemen... | 07/14/1987 |
| 4440036 | Gaming apparatus having manually controllable operating speed An improved amusement or game device of the type which has one or more indicia-bearing rotatable reels which are rotated upon initiation of play by a player is disclosed. The game device has an improved main drive mechanism which permits the player to var... | 04/03/1984 |
| 3930776 | Hydraulic wrench A hydraulic wrench has a support, and a drive assembly which is mounted thereon and which includes a shaft that is turnable, a pair of sector drive plates which are mounted on the shaft turnable relative to the same and spaced from one another, each drive... | 01/06/1976 |
