Bulgaria vs Hong Kong, China: Annual patents filed in sustainable energy
Bulgaria
1 patents
in 2023
Hong Kong, China
1 patents
in 2020
Bulgaria rank
61st
Hong Kong, China rank
61st
Annual patents filed in sustainable energy over time
- Bulgaria
- Hong Kong, China
How they compare
Bulgaria currently reports 1 patents against 1 patents in Hong Kong, China, a difference of 0 patents.
The two have swapped places 1 time across 21 shared years of data; in 2000 it was Hong Kong, China ahead.
Bulgaria ranks 61st and Hong Kong, China ranks 61st of 74 countries.
Across the 3 decades both report, Bulgaria averaged higher in 1 and Hong Kong, China in 2.
Head to head by decade
| Decade | Bulgaria | Hong Kong, China | Difference | Ahead |
|---|---|---|---|---|
| 2000s | 17.1 patents | 162.3 patents | 145.2 patents | Hong Kong, China |
| 2010s | 18.2 patents | 307.2 patents | 289 patents | Hong Kong, China |
| 2020s | 22 patents | 1 patents | 21 patents | Bulgaria |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher annual patents filed in sustainable energy, Bulgaria or Hong Kong, China?
- Bulgaria, at 1 patents against 1 patents in Hong Kong, China as of 2023.
- What is the difference in annual patents filed in sustainable energy between Bulgaria and Hong Kong, China?
- 0 patents, with Bulgaria ahead.
- How many years of comparable data are there for Bulgaria and Hong Kong, China?
- 21 years are reported by both, from 2000 to 2020.
- How do Bulgaria and Hong Kong, China rank globally for annual patents filed in sustainable energy?
- Bulgaria ranks 61st and Hong Kong, China ranks 61st of 74 countries.
- Where does this data come from?
- IRENA - INSPIRE Platform (2025) – with major processing by Our World in Data, published as Annual patents filed in sustainable energy. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Figures in recent years are subject to a time lag; submitted patents may not yet be reflected in the data.