Company Filing History:
5 out of 13 
3 out of 33 
2 out of 114 
Years Active: 1978-1991
Title: Celebrating the Innovations of Bobby J Hallmark
Introduction
Bobby J Hallmark, an innovative inventor based in Fort Worth, Texas, has made significant contributions to the field of borehole technology. With a total of 11 patents to his name, Hallmark's work is characterized by cutting-edge inventions that enhance the efficiency and accuracy of geological explorations.
Latest Patents
Among Hallmark's notable innovations are two recent patents that highlight his expertise. The first, a **Borehole Televiewer System**, introduces a sonde that is suspended in borehole fluids. This system features a variable speed brushless DC motor that drives a rotatable mount at varying speeds to ensure the rotational speed corresponds with the sonde’s linear speed as it moves through the borehole. A quick-disconnect transducer head, equipped with acoustic transducers, transmits energy pulses to the borehole wall, allowing the receiver circuitry to analyze the reflected pulses to generate a detailed video representation of the borehole wall.
Another significant patent is the **Method and Apparatus for Obtaining a Core Sample at Ambient Pressure**. This invention involves a sonde-supported sample receiving chamber that includes a main valve for sample extraction while maintaining equal downhole pressure. This innovative design ensures that the integrity of the sample is preserved during transfer, showcasing Hallmark's dedication to advancing geological sampling techniques.
Career Highlights
Bobby J Hallmark has had an impactful career with prominent companies such as Gearhart-Owen Industries, Inc. and Gearhart Industries, Inc. His work within these organizations has enabled him to push the boundaries of technological advancement in the field of borehole technology.
Collaborations
Throughout his career, Hallmark has collaborated with notable individuals, including Milton B Enderlin and Edward C Schwind. These partnerships have fostered an environment of innovation and creativity, leading to the development of several advanced tools and techniques utilized in geological exploration.
Conclusion
Bobby J Hallmark stands out as a prolific inventor whose contributions to the field of borehole technology have greatly influenced the industry. With his impressive portfolio of patents and a reputation for pioneering innovations, Hallmark continues to inspire future generations of inventors and engineers. His commitment to enhancing the exploration and analysis of geological formations underscores the vital role that innovation plays in advancing technology.