DIFF Subgroup
F03G 1/02 characterised by shape or material of spring, e.g. helical, spiral, coil
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Spring motors > characterised by shape or material of spring, e.g. helical, spiral, coil
CPC:
Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) > characterised by shape or material of spring, e.g. helical, spiral, coil
CPC subdivides this area 7x more granularly than IPC with 6 additional codes.
6 codes are CPC-only extensions.
Child Classifications
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