Engineering drawings, photographs, flow diagrams, concept sketches, etc.); literary works (e.g. the text of user manuals) and computer programs (e.g. machine, object and source code).
The general rule is that copyright lasts for 60 years. In the case of original literary, dramatic, musical and artistic works the 60-year period is counted from the year following the death of the author. In the case of cinematograph films, sound recordings, photographs, posthumous publications, anonymous and pseudonymous publications, works of government and works of international organisations, the 60-year period is counted from the date of publication.
After you file your application and receive diary number you have to wait for a mandatory period of 30 days so that no objection is filed in the Copyright office against your claim. In case any objection is filed, the Registrar of Copyrights after giving an opportunity of hearing to both the parties, may decide to register the work or otherwise.