Heat Pump Drying Patents: Top Companies & Filing Trends 2026
Heat Pump Drying and Energy Recovery Patents
57.1% of all 56 records sit with just five assignees, and 92.9% sit with ten — a small group has occupied most of the claim space in this field. Filings ran at low single digits through most of the period, reaching a peak of 6 in 2024. With fewer than four complete years once publication lag is accounted for, no growth rate can be stated reliably from this trend alone.
- 1SELF PROPELLED RES & DEV SPECIALISTS11
- 2WHIRLPOOL CORP6
- 3CHANNING STREET COPPER CO5
- 4NATIONAL UNIVERSITY OF SINGAPORE5
- 5SAMSUNG ELECTRONICS CO LTD5
See the full heat pump drying and energy recovery analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about heat pump drying patents
Who holds the most patents in heat pump drying and energy recovery?
One assignee leads this 26-company ranking with 11 of the 56 records in scope, well ahead of fifth place at 5 records. The top five assignees combined hold 57.1% of all records, and the top ten hold 92.9%, which means most of the remaining companies in the ranking hold only one or two records each. Anyone doing freedom-to-operate work should prioritise the leading names before spending time on the long tail.
What technology areas do heat pump dryer patents actually claim?
Within this dataset, D06F (laundering, drying and ironing) and F26B (drying) are the two largest IPC subclasses, each covering roughly half of the 56 records. F25B, the refrigeration and heat-pump cycle classification, appears in only 26.8% of records, and smaller adjacent classes like B01D (separation), F24F (air conditioning) and H01M (batteries) each cover under 11%. In short, most filings claim the drying appliance or process more than the thermodynamic cycle itself.
Is heat pump drying patent activity growing?
The trend runs from 2 filings in 2017 to a peak of 6 in 2024, with 2026 partial and understated because publication typically lags filing by around 18 months. There are fewer than four complete years of data once that lag is accounted for, so no reliable growth rate can be stated from this dataset alone. Treat the recent-year dip as a data artefact rather than a real slowdown until later publications land.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Heat Pump Drying and Energy Recovery covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.