Reticle protective structure and radiation sensitive validation apparatus
Patent 4056731 Issued on November 1, 1977. Estimated Expiration Date: 
November 1, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 1, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3457421 3564268 3581100 InventorAssigneeApplicationNo. 05/636719 filed on 12/01/1975US Classes:250/556, Document verification or graph reader209/534, Sorting paper money250/239, Housings (in addition to cell casing)250/559.44Identifying marking, pattern, or indiciaExaminersPrimary: Smith, Alfred E.Assistant: Moore, David K. Attorney, Agent or FirmAbstractThe reticle of a paper currency validating device of the type which uses a radiation sensing system is protected by the provision of a thin sapphire disc covering the reticle. | |
