Declension table of pātra

Masculine	Singular	Dual	Plural
Nominative	pātraḥ	pātrau	pātrāḥ
Vocative	pātra	pātrau	pātrāḥ
Accusative	pātram	pātrau	pātrān
Instrumental	pātreṇa	pātrābhyām	pātraiḥ pātrebhiḥ
Dative	pātrāya	pātrābhyām	pātrebhyaḥ
Ablative	pātrāt	pātrābhyām	pātrebhyaḥ
Genitive	pātrasya	pātrayoḥ	pātrāṇām
Locative	pātre	pātrayoḥ	pātreṣu

Compound pātra -

Adverb -pātram -pātrāt