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			 The ornamental design for a hand operated exercise bike, as shown and described.  | 
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FIG. 1 is a right side elevational view of a hand operated exercise bike showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a bottom plan view thereof; and
FIG. 7 is a rear perspective view of a modified embodiment of the design shown in FIGS. 1 through 6.
| Patent | Priority | Assignee | Title | 
| D305347, | Sep 28 1987 | Robert M., Greening, Jr. | Physical exerciser | 
| Patent | Priority | Assignee | Title | 
| 3759512, | |||
| 4071235, | Feb 02 1976 | Adjustable resistance exercising apparatus | |
| 4582318, | Jun 24 1983 | CYBEX INTERNATIONAL, INC | Exerciser machine having dual chain drive for a variable resistance device | 
| D283151, | Jun 15 1984 | Therapeutic exercising machine | 
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