Patent No. 4 · Filed 11 March 1977

Boat Propelling Apparatus

A pedal- or motor-driven oscillating-fin propulsion system for small boats. A genuine registered patent from the same team — just not a building services one.

Original Filing & Drawings

Boat Propelling Apparatus — original document, page 1

Boat Propelling Apparatus — original document, page 2

Boat Propelling Apparatus — original document, page 3

Boat Propelling Apparatus — original document, page 4

← Patent No. 3

Air Conditioning System

Patent No. 5 →

Air Conditioning Method and System