David C. Smart
73Patents
17h-index
44Co-inventors
84Inventor score
Filing activity: Jan 27, 1978 → Dec 22, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5619737A | Encodement-on-film recording apparatus utilizes flash components in a camera | Physics | 111 | Expired |
| US5231438A | Camera with interlock for cover piece and cartridge light shield | Physics | 62 | Expired |
| US5032854A | Photographic film cassette and camera apparatus and method | Physics | 61 | Expired |
| US4994828A | Camera apparatus for preventing load of exposed film | Physics | 40 | Expired |
| US5347334A | Film cassette with bar-coded film spool and provision for film double exposure prevention | Physics | 31 | Expired |
| US5040739A | Film-thrusting cassette | Physics | 27 | Expired |
| US5550608A | Apparatus and method for closing a film cassette and unloading the closed cassette from a camera | Physics | 26 | Expired |
| US4978985A | Film cassette having film-exposure status indicator | Physics | 23 | Expired |
| US4965600A | Camera for use with film cassette having film-exposure status indicator | Physics | 23 | Expired |
| US5323201A | Cassette ejecting apparatus | Physics | 21 | Expired |
| US5579070A | One-time-use camera has driver for closing film cassette which is broken to disable camera after completed use | Physics | 21 | Expired |
| US5629750A | One-time use camera uncovers ingress opening for insertion tool to eject cassette when cassette closed | Physics | 21 | Expired |
| US5477289A | Camera including multiple burst data to identify unexposed frames | Physics | 19 | Expired |
| US4303297A | Socket structure for electrical components | Electricity | 18 | Expired |
| US6147744A | Method for archiving film unit information | Physics | 18 | Expired |
| US5614976A | Camera with manual film rewind locked when cassette closed, preferably to position film exposed indicator in window of cassette | Physics | 17 | Expired |
| US4947197A | Simple camera for use with film cassette having film-exposure status indicator | Physics | 17 | Expired |
| US4332453A | Film loading apparatus | Physics | 13 | Expired |
| US5452055A | Apparatus and method for making a reference exposure on a leading and/or trailing portion of a filmstrip | Physics | 12 | Expired |
| US5608482A | Film loading method and related apparatus | Physics | 12 | Expired |
| US5608480A | One-time-use camera with stop-protrusion for engaging open light lock of cassette to prevent cassette from dislodging lid closing chamber | Physics | 11 | Expired |
| US5122823A | Film cassette loading apparatus in a photographic camera | Physics | 11 | Expired |
| US4991786A | Film cassette | Physics | 10 | Expired |
| US4992812A | Photographic camera with film threading apparatus | Physics | 10 | Expired |
| US5748990A | One-time-use camera with lid flexed to uncover chamber when cassette forcibly ejected from chamber | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.