Inventor
Joseph R. Dempewolf
Inventor
Albuquerque, NM, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus53%
H04JMultiplex communication18%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation12%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution12%
H04BTransmission6%
PatentTitleYear
6,591,040'Ultra-dense wavelength division multiplexing/demultiplexing devices'20036,480,648'Technique for detecting the status of WDM optical signals'20026,343,169'Ultra-dense wavelength division multiplexing/demultiplexing device'20026,137,933'Integrated bi-directional dual axial gradient refractive index/diffraction grating wavelength division multiplexer'20006,011,885'Integrated bi-directional gradient refractive index wavelength division multiplexer'20006,011,884'Integrated bi-directional axial gradient refractive index/diffraction grating wavelength division multiplexer'20005,999,672'Integrated bi-directional dual axial gradient refractive index/diffraction grating wavelength division multiplexer'19995,815,318'Axially-graded index-based couplers'19985,796,525'Quadaxial gradient index lens'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998Patents assigned to LIGHTPATH TECH INC (2)· patent assignee history
1998Based in Taos, NM, US· patent location history
1999Patents assigned to LIGHT CHIP INC (1)· patent assignee history
1999–2000Based in Albuquerque, NM, US· patent location history
2000–2002Patents assigned to LIGHTCHIP INC (5)· patent assignee history
2002–2003Based in Des Montes, NM, US· patent location history
2003Patents assigned to CONFLUENT PHOTONICS CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LIGHTCHIP INC | 5 | 2000–2002 |
| LIGHTPATH TECH INC | 2 | 1998 |
| CONFLUENT PHOTONICS CORP | 1 | 2003 |
| LIGHT CHIP INC | 1 | 1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| Albuquerque, NM, US | 4 | 1999–2000 |
| Des Montes, NM, US | 3 | 2002–2003 |
| Taos, NM, US | 2 | 1998 |