Robert A. Leffler has been granted 10 US patents while listed as an inventor at Carrier . The first was granted in 2022 and the most recent in September 2025. Robert A. Leffler ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Robert A. Leffler in Portland, ME, US.
Patents per Year Patents granted per year, 2022 to 2025 Bar chart with a peak of 3 patents in 2023. peak 3 2022: 2 patents 2022 2023: 3 patents 2023 2024: 2 patents 2024 2025: 3 patents 2025
Issued Patents All Time
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Showing 1–10 of 10 patents
Patent # Title Co-Inventors Date
12429832 Systems and methods for control optimization of building subsytems Matthew Clark , Ahmad M. Mahmoud , Phani Pavan Kumar Mangiahgari , Alexander Healey 2025-09-30
12359856 System and method for detection of refrigerant leaks Nikhil Saralkar 2025-07-15
12272949 Systems and methods for power generation forecasting using text mining and feature engineering — 2025-04-08
12078431 Microchannel heat exchanger for a furnace Arindom Joardar , Kevin Mercer , Tobias H. Sienel 2024-09-03
12038234 Microchannel heat exchanger having auxiliary headers and core Arindom Joardar , Jon P. Kennedy , Kevin Mercer , Thomas Bryant 2024-07-16
11713928 Microchannel heat exchanger having auxiliary headers and core Arindom Joardar , Jon P. Kennedy , Kevin Mercer , Thomas Bryant 2023-08-01
11614260 Heat exchanger for heat pump applications Kazuo Saito , Arindom Joardar 2023-03-28
11592244 Multiport fluid distributor and microchannel heat exchanger having the same Thomas Bryant , Kevin Mercer , Arindom Joardar , Tobias H. Sienel 2023-02-28
11493277 Microchannel heat exchanger Arindom Joardar , Thomas Bryant , Jon P. Kennedy , Kevin Mercer 2022-11-08
11236946 Microchannel heat exchanger Kevin Mercer , James Amick , Arindom Joardar 2022-02-01