| Planparallelglas | Nominativ, Singular | nominative case, singular | |
| Planparallelglase | Genitiv, Singular | genitive case, singular | |
| Planparallelglasen | Dativ, Singular | dative case, singular | |
| Planparallelglas(e)s | Akkusativ, Singular | accusative case, singular | |
| Planparallelglaser | Nominativ, Plural | nominative case, plural | |
| Planparallelglasern | Genitiv, Plural | genitive case, plural | |
| Planparallelglasn | Dativ, Plural | dative case, plural |