Company Filing History:
5 out of 5 
2 out of 2 
1 out of 1 Years Active: 1980-1993
Title: The Innovative Mind of David Chiang
Introduction
David Chiang is a notable inventor based in Dix Hills, NY (US), with a remarkable portfolio of 12 patents. His work primarily focuses on advancements in digital audio processing and paper handling technology. Chiang's innovative spirit has led to the development of solutions that enhance sound reproduction and streamline printing processes.
Latest Patents
One of Chiang's latest patents is the "Tuned deconvolution digital filter for elimination of loudspeaker output." This FIR (finite impulse response) type digital filter operates on digital audio signals in modern sound reproduction systems. It ensures that the loudspeaker produces a sound pressure wave that mirrors the original signal waveform. By sampling the response of a multi-driver speaker to a known broad band analog signal, a deconvolution filter is constructed to restore the blurred signal back to its original waveform. This process is linear and time invariant, allowing it to be applied to the speaker driving signal as a blur preventive. A fine-tuning procedure utilizing Lagrange's Method of Multipliers enhances the deconvolution process, achieving a frequency response flatness that surpasses simple deconvolution filters.
Another significant patent is the "Paper supply and stacking apparatus." This invention features a paper tray designed with a bottom, front, rear, and side walls to create an open box-like structure for storing sheets of paper. A pivotably mounted paper receiver allows for automatic and manual feeding of paper to a print roller. In automatic mode, a drive roller produces a buckle at the leading position of the paper to ensure alignment at the print roller, facilitating a straight and unskewed feed. The paper receiver is equipped with a conveyor belt driven from the print roller at a greater linear speed, ensuring a positive feed of the paper to a receiving station.
Career Highlights
Throughout his career, David Chiang has worked with various companies, including Mcc Associates. His contributions to the field of technology have been significant, showcasing his ability to innovate and improve existing systems.
Collaborations
Chiang has collaborated with notable individuals such as Mosi Chu and Solomon Manber, further enriching his experience and expertise in the field.
Conclusion
David Chiang's inventive contributions have made a lasting impact on both audio processing and printing technology. His patents reflect a deep understanding of engineering principles and a commitment to enhancing user experiences.