Turntable platter for record players
CA 1188228 A · Owner: Societa Italiana Vetro - Siv - S.P.A. · Inventors: Capriotti, Luigi; Massarelli, Liberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A turntable platter for record players consisting of two layers one of glass and one of plastic lying one on top of the other. The plastic layer can be of a thermoplastic and/or thermosetting material such as polycarbonate, polyacrylic, polystyrene or the like. The glass guarantees flatness rigidity and pleasant, appearance of the platter such features not always being, obtainable from the already known metal platters while, the plastic, guarantees light weight associated with such material. The glass-plastic combination in the turntable platter represents considerable progess in the particular industrial field as it guarantees the absorption of spurious vibrations, and secondly, optimum …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.