What is CPC F04C29/0078?

CPC F04C29/0078 is the Cooperative Patent Classification code for “Fixing rotors on shafts, e.g. by clamping together hub and shaft.”

How many patents are filed under CPC F04C29/0078 (Fixing rotors on shafts, e.g. by clamping together hub and shaft)?

Our database includes 75 publications tagged with this CPC code.

Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).

Fixing rotors on shafts, e.g. by clamping together hub and shaft · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F04C29/0078
Official title	{Fixing rotors on shafts, e.g. by clamping together hub and shaft}
Display label	Fixing rotors on shafts, e.g. by clamping together hub and shaft
Total patents	75

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is declining.

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Answers are generated from the same data shown on this page.

What is CPC F04C29/0078?: CPC F04C29/0078 is the Cooperative Patent Classification code for “Fixing rotors on shafts, e.g. by clamping together hub and shaft.”
How many patents are filed under CPC F04C29/0078 (Fixing rotors on shafts, e.g. by clamping together hub and shaft)?: Our database includes 75 publications tagged with this CPC code.
Is patent activity under CPC F04C29/0078 growing?: Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).