Apparatus to assist esophageal speech
CA 1189253 A · Owner: Henley-Cohn, Julian L. · Inventors: Jakubczak, Eugene R.; Henley-Cohn, Julian L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (16) to assist esophageal speech in an individual who has undergone a laryngectomy who has a tracheastome (10) and a tracheal-esophageal fistula (20). The apparatus (16) comprising an elastomeric tube (18) with an open tracheal end (26) and an esophageal end having a one-way slit valve (24) normally closed which allows air to be diverted from the trachea to the esophagus when the tracheastome is sealed and the patient exhales. The elastomeric air tube (18) has an elliptical cross section which contributes to higher rates of air flow and comfortable expiration pressures by reducing the bending movement of the portions of the tube located on either side of the slit or flapper …
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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 25, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 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.