Declension table of ?śaṅkhapātra

Neuter	Singular	Dual	Plural
Nominative	śaṅkhapātram	śaṅkhapātre	śaṅkhapātrāṇi
Vocative	śaṅkhapātra	śaṅkhapātre	śaṅkhapātrāṇi
Accusative	śaṅkhapātram	śaṅkhapātre	śaṅkhapātrāṇi
Instrumental	śaṅkhapātreṇa	śaṅkhapātrābhyām	śaṅkhapātraiḥ
Dative	śaṅkhapātrāya	śaṅkhapātrābhyām	śaṅkhapātrebhyaḥ
Ablative	śaṅkhapātrāt	śaṅkhapātrābhyām	śaṅkhapātrebhyaḥ
Genitive	śaṅkhapātrasya	śaṅkhapātrayoḥ	śaṅkhapātrāṇām
Locative	śaṅkhapātre	śaṅkhapātrayoḥ	śaṅkhapātreṣu

Compound śaṅkhapātra -

Adverb -śaṅkhapātram -śaṅkhapātrāt