Patent Intelligence · Domain Comparison
Clean EnergyvsMechanical Engineering
Side-by-side comparison across 8 patent dimensions: portfolio size, citation quality, concentration, prosecution speed, claim breadth, expiry opportunity, and filing velocity.
Clean Energy
Patents
123
Citations
2,223
Avg citations
18.1
3yr CAGR
-6.2%
HHI
272
Expiring ≤2029
12.0%
Avg prosecution
38 mo
Avg claims
19.9
Mechanical Engineering
Patents
369
Citations
14,879
Avg citations
40.3
3yr CAGR
+20.2%
HHI
518
Expiring ≤2029
3.5%
Avg prosecution
35 mo
Avg claims
19.4
Head-to-Head Comparison
| Metric | Clean Energy | Mechanical Engineering |
|---|---|---|
| Total patents | 123 | 369▲ |
| Total citations | 2,223 | 14,879▲ |
| Avg citations/patent | 18.1 | 40.3▲ |
| 3-year CAGR | -6.2% | +20.2%▲ |
| HHI concentration | 272▲ | 518 |
| Expiring ≤2029 | 12.0%▲ | 3.5% |
| Avg prosecution (mo) | 38 | 35▲ |
| Avg claims/patent | 19.9▲ | 19.4 |
▲ = higher is better for that metric. HHI: lower = more competitive landscape.
Grant Trend 2015–Present
Patents granted per year by domain.
2016
2018
2020
2022
2024
2026
Domain A
Domain B
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