Daniel C. Upp
35Patents
17h-index
43Co-inventors
81Inventor score
Filing activity: Mar 17, 1978 → Jun 14, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4967405A | System for cross-connecting high speed digital SONET signals | Electricity | 158 | Expired |
| US5040170A | System for cross-connecting high speed digital signals | Physics | 113 | Expired |
| US4998242A | Virtual tributary cross connect switch and switch network utilizing the same | Electricity | 75 | Expired |
| US5191582A | Method and apparatus for the high speed modification of a packet address field of a transmitted packet in a frame relay system | Electricity | 57 | Expired |
| US6631130B1 | Method and apparatus for switching ATM, TDM, and packet data through a single communications switch while maintaining TDM timing | Electricity | 47 | Expired |
| US5142529A | Method and means for transferring a data payload from a first SONET signal to a SONET signal of different frequency | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6954473B2 | Optoelectronic device employing at least one semiconductor heterojunction thyristor for producing variable electrical/optical delay | Electricity | 36 | Expired |
| US4914429A | Switch components and multiple data rate non-blocking switch network utilizing the same | Electricity | 36 | Expired |
| US6646983B1 | Network switch which supports TDM, ATM, and variable length packet traffic and includes automatic fault/congestion correction | Electricity | 33 | Expired |
| US5608731A | Closed loop clock recovery for synchronous residual time stamp | Electricity | 30 | Expired |
| US5157655A | Apparatus for generating a DS-3 signal from the data component of an STS-1 payload signal | Physics | 25 | Expired |
| US6636515B1 | Method for switching ATM, TDM, and packet data through a single communications switch | Electricity | 22 | Expired |
| US5901146A | Asynchronous data transfer and source traffic control system | Electricity | 21 | Expired |
| US4456991A | Telephone line circuit and system | Electricity | 20 | Expired |
| US4439826A | Diagnostic system for a distributed control switching network | Electricity | 19 | Expired |
| US4201890A | Multiport digital switching element | Electricity | 19 | Expired |
| US6636511B1 | Method of multicasting data through a communications switch | Electricity | 19 | Expired |
| US4608684A | Digital switching systems employing multi-channel frame association apparatus | Electricity | 17 | Expired |
| US5297180A | Digital clock dejitter circuits for regenerating clock signals with minimal jitter | Physics | 17 | Expired |
| US5548534A | Two stage clock dejitter circuit for regenerating an E4 telecommunications signal from the data component of an STS-3C signal | Physics | 16 | Expired |
| US5033064A | Clock dejitter circuit for regenerating DS1 signal | Physics | 16 | Expired |
| US7064697B2 | Photonic sigma delta analog-to-digital conversation employing dual heterojunction thyristors | Electricity | 14 | Expired |
| US6243359A | Methods and apparatus for managing traffic in an atm network | Electricity | 13 | Expired |
| US6104724A | Asynchronous data transfer and source traffic control system | Electricity | 12 | Expired |
| US4598396A | Duplex transmission mechanism for digital telephones | Electricity | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.