Yongnam Ahn — 8 Patents at HP | Patent Leaderboard

Yongnam Ahn has been granted 8 US patents while listed as an inventor at HP. The first was granted in 2015 and the most recent in August 2025. Yongnam Ahn ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Yongnam Ahn in Gyeong-dong, KR.

Patents per Year

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12393138	Toner refill cartridge having structure in which driving force is transmitted through toner outlet	Woongyong Choi, Junhui Kim	2025-08-19
12282273	Development device having rotatable wiper wiping optical surface of lens	Jongin Kim, Woongyong Choi, Shinhyup Kang	2025-04-22
12271120	Toner refill cartridge having pump for automatic toner refilling	Shinhyup Kang, Jinhwa Hong, Junhui Kim	2025-04-08
11392058	Toner refilling portion of development cartridge to provide feedback indicating inlet shutter position	Seung Il Kim, Jiwon Moon	2022-07-19	$5,185,000
11366407	Structure to refill toner to development cartridge mounted in main body	Yong-Kwan Cho, Seung-gweon Lee, Jiwon Moon, Woongyong Choi, Yongil Moon +1 more	2022-06-21	$5,396,000
11204568	Plunger locking structure in syringe type toner refill cartridge	Woongyong Choi	2021-12-21	$16,138,000
D907698	Development cartridge for a printer	Ji-Won Moon, Seung-gweon Lee, Woong-Yong Choi, Yong-Kwan Cho, Yongil Moon +5 more	2021-01-12
8966936	Expansion valve and air conditioner for vehicles having the same	Jaehyeong Kim, Byeonghak Min	2015-03-03