Prime-mover Dynamo Plants Patents (Class 290)

Miscellaneous (Class 290/1R)

Unitary plant (Class 290/1A)
Air-cooled generator (Class 290/1B)
Drive gearing (Class 290/1C)
Chain drive (Class 290/1D)
Spring motor (Class 290/1E)

Heating plants (Class 290/2)

Train (Class 290/3)

Plural prime mover (Class 290/4R)

Alternating current, rotary field and armature (Class 290/5)

Multiple-armature dynamo (Class 290/6)

Electric control (Class 290/7)

Excitation dynamo (Class 290/8)
Traction
Demand starters (Class 290/30R)
Starting and generating dynamo (Class 290/31)
Electric-starting motor with generator (Class 290/36R)
Electric-starting motor (Class 290/38R)
Rotary field and armature (Class 290/39)
Engine control (Class 290/40R)
Tide and wave motors (Class 290/42)
Fluid-current motors (Class 290/43)

Traction (Class 290/45)

Starting and generating dynamo (Class 290/46)

Electric-starting motor with generator (Class 290/47)

Electric-starting motor (Class 290/48)

Rotary field and armature (Class 290/49)

Battery (Class 290/50)

Engine control (Class 290/51)

Turbogenerators (Class 290/52)

Tide and wave motors (Class 290/53)

Fluid-current motors (Class 290/54)

Class-related foreign documents (Class 290/FOR000)