Talk:Fessenden transducer

US Patents
In Underwater acoustics D J Creasey 1981 Phys. Educ. 16 244-250  doi:10.1088/0031-9120/16/4/316 To combat this Fessenden. (US. patent nos 1207388, 1167366, 1213610 and 1213611). built a large piston-driven transducer based on ...

The patents may contain something interesting: -- Petri Krohn 01:18, 10 July 2007 (UTC)