| 发明名称 |
Data base update scheme |
| 摘要 |
A method and apparatus for modifying data which is stored in a medium of archival quality. The original data is left unmodified, and a modification document is prepared which has addition and deletion data thereon. The original and modified data is combined in a given way to generate a correctly modified composite.
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| 申请公布号 |
US4121196(A) |
申请公布日期 |
1978.10.17 |
| 申请号 |
US19770792832 |
申请日期 |
1977.05.02 |
| 申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE ARMY |
发明人 |
JOHNSON, RICHARD N.;SCHNEIDER, MARVIN J. |
| 分类号 |
G06K1/12;G06K17/00;(IPC1-7):G02B5/00;G03B21/14;G06K9/00 |
主分类号 |
G06K1/12 |
| 代理机构 |
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代理人 |
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| 主权项 |
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