3613621

Information

• Patent Grant
• 3613621

• References
• Source

• Patent Number

  3,613,621

• Date Filed

  Not available

• Date Issued

  Tuesday, October 19, 1971
  53 years ago

• CPC

  • B63C11/38 - with entrance above water surface
  • B63C11/49 - Floating structures with underwater viewing devices

• US Classifications

  • 114 - Ships
  • 405 - Hydraulic and earth engineering