David E. Butz
17Patents
7h-index
11Co-inventors
63Inventor score
Filing activity: Oct 3, 1974 → Jul 29, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5139951A | Culture device having a detachable cell or tissue growth surface | Chemistry; Metallurgy | 71 | Expired |
| US4308351A | System for growing tissue cultures | Chemistry; Metallurgy | 56 | Expired |
| US4292273A | Radioimmunoassay plate | Performing Operations; Transporting | 34 | Expired |
| US5272083A | Culture device and method of use having a detachable cell or tissue growth surface | Chemistry; Metallurgy | 27 | Expired |
| US6462977B2 | Data storage device having virtual columns and addressing layers | Physics | 18 | Expired |
| US4490764A | Disc pack assembly | Physics | 14 | Expired |
| US8029742B2 | Multi-channel pipettor with repositionable tips | Performing Operations; Transporting | 11 | Active |
| US4355340A | Disc pack with snap on handle | Physics | 7 | Expired |
| US4233586A | Disk pack bottom cover with magnetic latch | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6050543A | Two-piece solenoid valve | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US8128892B2 | Programmable multi-channel pipettor with repositionable tips | Performing Operations; Transporting | 5 | Active |
| US8518345B2 | Multi-channel pipettor with variably repositionable tips | Performing Operations; Transporting | 4 | Active |
| US3936007A | Paper log roller | Performing Operations; Transporting | 4 | Expired |
| US4253129A | Disc pack handle mechanism | Physics | 2 | Expired |
| US7283381B2 | System and methods for addressing a matrix incorporating virtual columns and addressing layers | Physics | 0 | Expired |
| US9339810B2 | Multi-channel pipettor with repositionable tips | Performing Operations; Transporting | 0 | Active |
| US4271963A | Disk pack handle mechanism | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.