2026-10-08 Zefix (Swiss central business name index)

Query (by script, Zefix REST API firm search): name Colysa. Results saved: research/pages/zefix-colysa.json, zefix-colysa-260118.json.

Result [web]

https://www.zefix.admin.ch (firm search "Colysa") - One firm: Colysa SA, UID CHE-103.596.682, seat Val-de-Ruz (canton Neuchatel), route de la Cotiere 18, 2063 Vilars NE, status existing; last SHAB publication 2021-08-30. Cantonal extract: https://rcnet.ne.ch/extract?companyOfsUid=CHE-103.596.682 (not opened). - Registered purpose: development, production and sale of technical, microtechnical, mechanical, electronic, computing and aeronautical products. No mention of Lakhovsky in the register entry.

Bearing (no verdicts)

• Priority 4: the original C.O.L.Y.S.A. (Circuit Oscillant LakhovskY S.A.) was a Paris company in 1929 (26 rue des Marronniers, per the 1929 booklet). The present Swiss Colysa SA runs colysa.ch ("Laboratoires Colysa", which sells Lakhovsky-type devices and publishes the 1925 press article). The register gives no date of founding or link to the Paris company; the cantonal extract and the French Registre du commerce (Paris, 1929-1940s) would show whether there is a line of succession.