Grammatical cases
List of grammatical cases
Abessive case
Ablative case
Absolutive case
Adessive case
Allative case
Causal case
Causal-final case
Comitative case
Dative case
Dedative case
Delative case
Disjunctive case
Distributive case
Distributive-temporal case
Elative case
Essive case
Essive-formal case
Essive-modal case
Excessive case
Final case
Formal case
Genitive case
Illative case
Inessive case
Instructive case
Instrumental case
Lative case
Locative case
Modal case
Multiplicative case
Oblique case
Objective case
Partitive case
Possessive case
Postpositional case
Prepositional case
Prolative case
Prosecutive case
Separative case
Sociative case
Sublative case
Superessive case
Temporal case
Terminative case
Translative case
Vialis case
Vocative case
Morphosyntactic alignment
Absolutive case
Accusative case
Ergative case
Instrumental case
Instrumental-comitative case
Intransitive case
Nominative case
Declension
Declension in English
edit (http://www.wordiq.com/definition/Template:Case_table)

This case in Hungarian language can express the person in whose company (cf. Latin socius) the action is carried out, or to any belongings of people which take part in the action (together with their owners). This case is not productive any more; nowadays the Instrumental-comitative case is usually used instead.