Company Filing History:
2 out of 42 
2 out of 16 
1 out of 12 Years Active: 1983-2000
Title: Innovations by Earl J Peterman
Introduction
Earl J Peterman is a notable inventor based in Philo, California, with a total of five patents to his name. His work primarily focuses on technologies that enhance the detection and location of underground utilities, showcasing his commitment to improving safety and efficiency in this field.
Latest Patents
One of his latest patents is the "Continuous-depth-indicating underground pipe and cable locator." This innovative device features a top and bottom receiver antenna sensor connected to respective amplifier channels. A separate transmitter stimulates electromagnetic radiations from buried pipes, cables, or other electrical conductors. The signals obtained from the sensors are processed to provide continuous depth readings, allowing for accurate and real-time monitoring of underground utilities.
Another significant patent is the "Method for locating the joints and fracture points of underground cast iron gas mains." This method involves connecting sections of an underground cast iron gas main pipeline to a signal generator. The technique allows for the plotting of the pipeline's centerline on the surface, utilizing the impedance differences at the joints to identify their locations accurately.
Career Highlights
Earl J Peterman has made substantial contributions to the field of underground utility detection. His innovative approaches have led to advancements that benefit various industries. He has worked with reputable companies such as Metrotech Corporation and Heath Consultants Incorporated, where he applied his expertise in developing practical solutions for underground utility management.
Collaborations
Earl has collaborated with his coworker, David L Peterman, to further enhance the effectiveness of their inventions and methodologies. Their combined efforts have led to significant advancements in the field of underground utility detection.
Conclusion
Earl J Peterman's contributions to the field of underground utility detection through his innovative patents and collaborative efforts have made a lasting impact. His work continues to influence the industry, ensuring safer and more efficient methods for locating underground utilities.