Inventor
Chang Nam Ahn
Inventor
Kyungki-do, KR
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Fprimary
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices31%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1019%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for6%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure6%
G01MTesting static or dynamic balance of machines or structures6%
G09BEducational or demonstration appliances6%
H10BElectronic memory devices6%
H10DInorganic electric semiconductor devices6%
PatentTitleYear
6,691,585'Anthropomorphic dummy head for use in vehicle crash test'20046,049,660'Simulation method in lithographic process'20005,897,975'Phase shift mask for formation of contact holes having micro dimension'19995,817,437'Method for detecting phase error of a phase shift mask'19985,770,338'Phase shifting overlay mark that measures exposure energy and focus'19985,712,063'Phase shift mask comprising light shielding regions having a multiple box structure'19985,583,069'Method for making a fine annular charge storage electrode in a semiconductor device using a phase-shift mask'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–2000Patents assigned to HYUNDAI ELECTRONICS IND (6)· patent assignee history
1996Based in Ichonkun, KR· patent location history
1998Based in Ichon, KR· patent location history
1998Based in Incheon, KR· patent location history
1999–2004Based in Kyungki-do, KR· patent location history
2000Based in Ichon-shi, KR· patent location history
2004Patents assigned to HYUNDAI MOTOR CO LTD (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HYUNDAI ELECTRONICS IND | 6 | 1996–2000 |
| HYUNDAI MOTOR CO LTD | 1 | 2004 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kyungki-do, KR | 2 | 1999–2004 |
| Ichon, KR | 2 | 1998 |
| Ichon-shi, KR | 1 | 2000 |
| Incheon, KR | 1 | 1998 |
| Ichonkun, KR | 1 | 1996 |