Company Filing History:
5 out of 1,068 
1 out of 8,375 
Years Active: 1976-1991
Title: Innovations of John M Dahlen
Introduction
John M Dahlen is a notable inventor based in Duxbury, MA (US). He has made significant contributions to the field of oceanography and magnetic field measurement, holding a total of 6 patents. His work focuses on creating innovative solutions that enhance our understanding of ocean currents and the Earth's magnetic field.
Latest Patents
One of Dahlen's latest inventions is the "Low Cost Drifter." This device is designed to accurately follow near-surface ocean currents and periodically transmit data and position information to monitoring satellites. The drifter features a floating surface buoy shaped like an oblate spheroid, which houses an electronic system, a slotted plane antenna, a transmitter, and various environmental sensors. The buoy is stabilized by a drogue that follows ocean currents, allowing for effective tracking of oceanic movements. The system is designed to conserve battery life, enabling it to operate unattended for several years while providing critical data on ocean conditions.
Another significant invention by Dahlen is a method and apparatus for measuring the undistorted magnetic field of the Earth. This system generates a magnetic field signal that accurately represents the Earth's magnetic field at any location, independent of distortions caused by nearby materials or internal magnetic sources. This innovation is crucial for various applications in geophysics and navigation.
Career Highlights
Throughout his career, John M Dahlen has worked with prestigious organizations such as the Charles Stark Draper Laboratory, Inc. and the Massachusetts Institute of Technology. His experience in these institutions has allowed him to develop and refine his innovative ideas, contributing to advancements in technology and research.
Collaborations
Dahlen has collaborated with notable individuals in his field, including John T Shillingford, Jr. and John F McKenna, Jr. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and expertise.
Conclusion
John M Dahlen's contributions to the fields of oceanography and magnetic field measurement demonstrate his innovative spirit and dedication to advancing technology. His inventions not only enhance our understanding of natural phenomena but also pave the way for future research and exploration.