SUBMARINE SIGNAL COMPANY & SUBMARINE SIGNAL CORPORATION v. HUGHES & SON, LTD.
(1931) 41 Ll L Rep 21
CHANCERY DIVISION.
Before Mr. Justice Bennett.
Patent - Infringement - Echo sounding apparatus for use in ships - "Fessenden" patent - Claim for injunction and damages - Defence of invalidity and non-infringement-Electric oscillator -