Patent Act permited patenting of certain plants to help American culture.
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| Number | Title | Issue Date |
| 5263580 | Case for an optical disk A plurality of supporting members are provided on a base plate of a case body. A peripheral portion of an optical disk is mounted on the supporting members. A spring is provided in the case body. A peripheral edge of the disk is engaged with the spring so... | 11/23/1993 |