Company Filing History:
14 out of 43 
8 out of 2,107 
3 out of 4,197 
Years Active: 1987-2004
Title: David N Critchlow: A Prominent Innovator in Wireless Technologies
Introduction
David N Critchlow, based in San Diego, CA, is a notable inventor and engineer, recognized for his significant contributions to wireless technology with a remarkable total of 28 patents. His visionary work has propelled advancements in the field, particularly in areas surrounding digital signal processing and communication systems.
Latest Patents
Among David's latest inventions is a FIR (Finite Impulse Response) chip designed for use in a wireless subscriber unit. The functionality of this chip encompasses a processor that transcends input signals, providing digital input symbols. The output signals received are then demodulated, allowing for the synthesis of digital output symbols through a filtered process. Key components of this patent include an internal address decoder for function access, a control and status register for managing internal functions, and a FIR filter that processes the digital input symbols effectively.
Another significant innovation is the subscriber unit that produces a modulated digital frequency. This unit comprises a processor which generates an output phase signal that corresponds to a selected output digital frequency. The invention utilizes a tuning register and a lookup table that holds predefined stored values for signal amplitude. A sine and cosine generator leverages this phase signal to create corresponding waveforms, ultimately leading to the modulation of the selected digital frequency.
Career Highlights
David has served in pivotal roles at various companies, including International Mobile Machines Corporation and Interdigital Technology Corporation. His tenure at these organizations has solidified his reputation as a leader in the sphere of telecommunications and processors.
Collaborations
Throughout his career, David has collaborated with esteemed professionals, including Karle J Johnson and Moshe Yehushua. These partnerships have fostered innovative ideas and accelerated the development of groundbreaking technologies.
Conclusion
David N Critchlow continues to be an influential figure in the landscape of wireless innovations. With a strong portfolio of patents demonstrating his expertise and commitment to advancing communication technologies, he sets a remarkable example for future inventors and engineers aiming to make their mark in the industry.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.