logo

For the Inventor, By the Inventor

Krefeld, Germany

Marc Graaf

This inventor holds 32 USPTO granted patents and 12 published patent applications and 1 EPO patent, primarily in Vehicle Climate Control. Top assignees: Hanon Systems, Halla Visteon Climate Control Corporation, Visteon Global Technolgoies, Inc.. Active years: 2007-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Marc Graaf. Retrieved from https://idiyas.com/inventor/marc-graaf

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 32 

% Patents Active = 93.8

 

Average Co-Inventor Count = 3.3

ph-index = 4

Forward Citations = 56(Granted Patents)


Company Filing History:

goldMedal25 out of 858 
 
Hanon Systems
 patents
silverMedal4 out of 66 
 
Halla Visteon Climate Control Corporation
 patents
bronzeMedal3 out of 1,723 
 
Visteon Global Technolgoies, Inc.
 patents
4. 1 out of 3,575 
 
Audi Ag
 patents
where one patent can have more than one assignee

Years Active: 2007-2023

Loading Chart...
Loading Chart...
Areas of Expertise:
Expansion Valve
Refrigeration System
Heat Pump
Air Conditioning
Refrigerant Circuit
Heat Exchanger
Cooling Capacity
Climate Control
Automobile HVAC
Icing Prevention
Liquid Refrigerant
Battery Cooling
32 patents (USPTO):Explore Patents
1. 11781657 - 3-2 way expansion valve (2023-10-10),
2. 10989451 - Oil management in a refrigeration system—compressor oil cooler integrated into gascooler (2021-04-27),
3. 10914504 - Device and method for icing prevention regulation for heat pump evaporators (2021-02-09),
4. 10875385 - Climate control system of a motor vehicle and method for operating the climate control system (2020-12-29),
5. 10787061 - Heat pump system with additional heat source for evaporation of refrigerant (2020-09-29),
6. 10712064 - Apparatus for separating and storing liquid refrigerant in refrigerant circuit (2020-07-14),
7. 10710433 - AC-system with very high cooling capacity (2020-07-14),
8. 10571164 - Air-conditioning system of a motor vehicle and method for operating the air-conditioning system (2020-02-25),
9. 10449834 - Refrigerant circuit for a vehicle air conditioning system with heat pump (2019-10-22),
10. 10363792 - Air-conditioning system for cooling and drying air in passenger compartment of vehicle (2019-07-30),
11. 10279655 - HV iCool light HVAC (2019-05-07),
12. 10252596 - Chiller integration into vcool system (2019-04-09),
13. 10160290 - Modular designed high performance heat pump system for a vehicle with low waste heat radiation (2018-12-25),
14. 10040334 - R744 based heat pump system with a water cooled gas cooler for cooling, heating and dehumidification of an EV/HEV (2018-08-07),
15. 10017031 - Heat exchanger arrangement for heat uptake and air conditioning system of a motor vehicle (2018-07-10),

Title: Innovator Spotlight: Marc Graaf

Introduction

Marc Graaf is a prolific inventor based in Krefeld, Germany, holding an impressive portfolio of 32 patents. His innovative contributions primarily focus on advancements in heat pump systems and refrigeration technologies, making a significant impact in the automotive and climate control industries.

Latest Patents

Among his latest inventions is the 3-2 way expansion valve, a key component introduced for heat pump systems in motor vehicles. This valve features at least one inlet and two outlets, along with a valve element that includes a throughlet and an expansion recess, allowing for efficient fluidic connections. Another noteworthy invention is the oil management system within a refrigeration setup, which incorporates a compressor oil cooler integrated into the gas cooler. This advanced heat exchanger separates oil from a coolant-oil mixture while cooling both the oil and the coolant, comprising two distinct areas with dedicated flow channels for each fluid. This design enhances the efficiency and performance of refrigeration systems.

Career Highlights

Marc has built a remarkable career at notable companies including Hanon Systems and Halla Visteon Climate Control Corporation. His roles in these organizations have allowed him to develop and refine his innovative ideas into patented technologies that improve climate control systems in vehicles.

Collaborations

Throughout his career, Marc has collaborated with talented professionals like Navid Durrani and Gerald Richter. These partnerships have undoubtedly contributed to the ingenuity reflected in his patents, enhancing the evolution of automotive climate technology.

Conclusion

Marc Graaf exemplifies the spirit of innovation through his extensive patent portfolio and contributions to the field of vehicle climate control systems. His work continues to influence the development of efficient and effective technologies that improve comfort and energy management in modern vehicles.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…