Inventor
Charles Haggans
Inventor
Clarksville, MD, US
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Jprimary
H04JMultiplex communication50%
G02BOptical elements, systems or apparatus19%
H04BTransmission19%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light6%
H04QSelecting6%
PatentTitleYear
7,697,843'Modular add/drop multiplexer including a wavelength selective switch'20107,499,652'Modular add/drop multiplexer including a wavelength selective switch'20097,415,208'Method and system for allocating bandwidth in an optical communication network'20087,356,259'Optical bypass upgrade configuration'20087,308,197'Modular add/drop multiplexer including a wavelength selective switch'20077,286,574'Infrared laser'20077,280,762'Optical communication system having dynamic gain equalization'20077,092,148'Optical communication system having dynamic gain equalization'20067,075,711'Optical communication system having dynamic gain equalization'20066,967,768'Optical communication system having dynamic gain equalization'20056,058,231'Boron-doped optical fiber'20006,005,999'Waveguide narrowband rejection filter'19995,852,690'Depressed cladding fiber design for reducing coupling to cladding modes in fiber gratings'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998Patents assigned to MINNESOTA MINING & MFG (1)· patent assignee history
1998–2000Based in Woodbury, MN, US· patent location history
1999–2000Patents assigned to 3M INNOVATIVE PROPERTIES CO (2)· patent assignee history
2005–2008Based in Clarksville, MD, US· patent location history
2006–2010Patents assigned to CIENA CORP (8)· patent assignee history
2007Patents assigned to NEUMANN INFORMATION SYSTEMS IN (1)· patent assignee history
2007Based in Colorado Springs, CO, US· patent location history
2009–2010Based in Boulder, CO, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CIENA CORP | 8 | 2006–2010 |
| 3M INNOVATIVE PROPERTIES CO | 2 | 1999–2000 |
| MINNESOTA MINING & MFG | 1 | 1998 |
| NEUMANN INFORMATION SYSTEMS IN | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Clarksville, Maryland, US | 7 | 2005–2008 |
| Woodbury, Minnesota, US | 3 | 1998–2000 |
| Boulder, CO, US | 2 | 2009–2010 |
| Colorado Springs, CO, US | 1 | 2007 |