Declension table of ?pitṛpātra

Neuter	Singular	Dual	Plural
Nominative	pitṛpātram	pitṛpātre	pitṛpātrāṇi
Vocative	pitṛpātra	pitṛpātre	pitṛpātrāṇi
Accusative	pitṛpātram	pitṛpātre	pitṛpātrāṇi
Instrumental	pitṛpātreṇa	pitṛpātrābhyām	pitṛpātraiḥ
Dative	pitṛpātrāya	pitṛpātrābhyām	pitṛpātrebhyaḥ
Ablative	pitṛpātrāt	pitṛpātrābhyām	pitṛpātrebhyaḥ
Genitive	pitṛpātrasya	pitṛpātrayoḥ	pitṛpātrāṇām
Locative	pitṛpātre	pitṛpātrayoḥ	pitṛpātreṣu

Compound pitṛpātra -

Adverb -pitṛpātram -pitṛpātrāt