Waterproof pushbutton telephone subset

• US 3,372,246 A
• Filed: 08/14/1964
• Issued: 03/05/1968
• Est. Priority Date: 08/14/1964
• Status: Expired due to Term

• Current Assignee: ITT Corporation (ITT, Inc.)
• Original Assignee: Walter J. Knuepfer
• Inventors: Knuepfer, Walter J.
• Application Number:
  US04/389,676
• Time in Patent Office: 1,299 Days
• US Class Current: 379/368
• CPC Class Codes: H01H 13/06 Dustproof, splashproof, drip-proof, waterproof or flameproof casings
• CPC Class Codes: H01H 2223/003 Membrane embracing all keys
• CPC Class Codes: H04M 1/18 Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment H04M1/19 takes precedence

Claims