Daily Law Reporting
Tribunals, High Courts and Supreme Court on
Copyrights, Trade Marks, Patents and Designs

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You can search old cases published in any Indian law journal
Database of old year cases might be bigger then you expect and is growing too

Search
You can search in Head Note of the old judgments
Headnote search is generally very close to the topic you are looking for

You can search old cases by Citation or by Name also