Fennema; Alan A

Patent Applications and Registrations

Patent applications and USPTO patent grants for Fennema; Alan A.The latest application filed is for "optical wavelength selective switches with guard bands".

Company Profile

0.16.6

Fennema; Alan A - San Jose CA
Fennema; Alan A. - San Jose CA
Fennema, Alan A. - San Josec CA
Fennema; Alan A. - Tucson AZ

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Optical wavelength selective switches with guard bands Grant 10,505,656 - Fennema Dec	2019-12-10
Optical Wavelength Selective Switches With Guard Bands App 20180294912 - Fennema; Alan A.	2018-10-11
Method and apparatus for disc drive data security using fields in servo wedges Grant 7,518,816 - Fennema , et al. April 14, 2	2009-04-14
Apparatus and method for phase control of tunable external cavity lasers Grant 6,912,235 - Anthon , et al. June 28, 2	2005-06-28
Method and apparatus for disc drive data security using fields in servo wedges Grant 6,898,038 - Fennema , et al. May 24, 2	2005-05-24
Apparatus for frequency tuning and locking and method for operating same Grant 6,898,221 - Berger , et al. May 24, 2	2005-05-24
Method and apparatus for disc drive data security using fields in servo wedges App 20040228237 - Fennema, Alan A. ; et al.	2004-11-18
Apparatus and method for phase control of tunable external cavity lasers App 20040213306 - Fennema, Alan A. ; et al.	2004-10-28
Self-writing servo and clock fields on a recording medium Grant 6,785,075 - Bryant , et al. August 31, 2	2004-08-31
Apparatus and method for phase control of tunable external cavity lasers App 20030026302 - Anthon, Douglas W. ; et al.	2003-02-06
Apparatus for frequency tuning and locking and method for operating same App 20020164125 - Berger, Jill D. ; et al.	2002-11-07
Circuit for self-writing servo and clock fields on a disc drive App 20020048107 - Bryant, Lawrence M. ; et al.	2002-04-25
System and method of efficient servo sector encoding Grant 6,345,021 - Belser , et al. February 5, 2	2002-02-05
Optical disk drive with multiple data layer disk and system for focusing the optical beam Grant 5,499,231 - Fennema , et al. March 12, 1	1996-03-12
Single loop servo-positioning systems having means for changing the dynamic range of a position-error signal with speed of the relatively movable members Grant 5,257,251 - Chow , et al. October 26, 1	1993-10-26
Operating optical disk drives including calibrating a tracking error signal Grant 5,220,546 - Fennema June 15, 1	1993-06-15
Acquiring a best focus using a focus signal offset Grant 5,164,932 - Fennema , et al. November 17, 1	1992-11-17
Reducing amplitude variations of optical disk readback signals and increasing reliability of track-crossing counts Grant 5,138,594 - Fennema , et al. August 11, 1	1992-08-11
Optical disk recorder for diverse media types and having a predetermined initialization or start-up procedure Grant 5,136,569 - Fennema , et al. August 4, 1	1992-08-04
Calibrating optical disk recorders to some parameters during disk spin up while deferring calibration of other parameters Grant 5,134,602 - Baca , et al. July 28, 1	1992-07-28
Positioning systems employing velocity and position control loops with position control loop having an extended range Grant 5,090,002 - Chow , et al. February 18, 1	1992-02-18
Track seeking using a track following loop Grant 4,839,876 - Fennema June 13, 1	1989-06-13

uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.

While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.

All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.