Declension table of ?pratapatra

Neuter	Singular	Dual	Plural
Nominative	pratapatram	pratapatre	pratapatrāṇi
Vocative	pratapatra	pratapatre	pratapatrāṇi
Accusative	pratapatram	pratapatre	pratapatrāṇi
Instrumental	pratapatreṇa	pratapatrābhyām	pratapatraiḥ
Dative	pratapatrāya	pratapatrābhyām	pratapatrebhyaḥ
Ablative	pratapatrāt	pratapatrābhyām	pratapatrebhyaḥ
Genitive	pratapatrasya	pratapatrayoḥ	pratapatrāṇām
Locative	pratapatre	pratapatrayoḥ	pratapatreṣu

Compound pratapatra -

Adverb -pratapatram -pratapatrāt