1920:
The Patrick Engineering Company Ltd
Patrick Engineering Simplex Cyclemotor Bicycle Power Unit
Rec. Num. 1 of 2
Source: The Motor Cycle September 9th 1920
1921:
The Patrick Engineering Company Ltd
Simplex Cyclemotor - Simplex Pedal Cycle Motor Attachment
Rec. Num. 2 of 2
Source: The Motor Cycle March 17th 1921
