Company Filing History:
7 out of 76 
1 out of 20 Years Active: 1983-1995
Title: The Innovative Contributions of David E. Calapp
Introduction
David E. Calapp is a notable inventor based in Bellevue, WA, who has made significant contributions to the field of bicycle design. With a total of nine patents to his name, Calapp's work focuses on enhancing the functionality and comfort of bicycles through innovative engineering solutions.
Latest Patents
Among his latest patents, Calapp has developed a shock absorber for vehicles, specifically designed for bicycles. This invention features a novel bicycle frame and seat support system. The bicycle frame includes a top tube that extends substantially vertically from a second section, which diagonally descends towards the rear tube. This design incorporates two frame stays that connect to chain stays adjacent to the rear wheel hub. Additionally, a center tube extends from a bottom bracket to the top tube section, where the frame stays are joined. A beam seat support, constructed from a pair of elongated beams, is affixed to the frame's top tube first section, with a bicycle seat attached at the end of the beam seat support.
Career Highlights
Calapp has had a diverse career, working with companies such as Allsop, Inc. and Connelly Skis, Inc. His experience in these organizations has allowed him to refine his skills in product design and innovation, particularly in the realm of outdoor and recreational equipment.
Collaborations
Throughout his career, Calapp has collaborated with notable individuals, including James D. Allsop and Paul E. Barkley. These partnerships have contributed to the development of his innovative ideas and patents.
Conclusion
David E. Calapp's contributions to bicycle design and engineering exemplify the spirit of innovation. His patents reflect a commitment to improving the cycling experience through thoughtful design and functionality. His work continues to inspire advancements in the field of transportation.