Koh Hasegawa
25Patents
11h-index
25Co-inventors
71Inventor score
Filing activity: Dec 15, 1986 → Oct 4, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6091514A | Ink jet recording apparatus recording images when an ink jet recording head is installed thereon and reading images when an image reading head is installed thereon | Performing Operations; Transporting | 141 | Expired |
| US5731829A | Information processing and recording apparatus with two recording medium conveyance routes | Physics | 123 | Expired |
| US5610636A | Gap adjusting method and ink jet recording apparatus having gap adjusting mechanism | Performing Operations; Transporting | 61 | Expired |
| US5485991A | Automatic sheet feeding apparatus | Performing Operations; Transporting | 44 | Expired |
| US6382858B1 | Sheet material conveying apparatus and recording apparatus | Performing Operations; Transporting | 27 | Expired |
| US6250827A | Recording device and sheet material conveying device | Performing Operations; Transporting | 26 | Expired |
| US6511141B1 | Ink jet recording apparatus capable of reading images having an installation unit for installing an image reading head | Performing Operations; Transporting | 24 | Expired |
| US6200043A | Sheet feeding apparatus and image forming apparatus having such sheet feeding apparatus | Performing Operations; Transporting | 23 | Expired |
| US6382761B1 | Recording apparatus and battery holding mechanism for use in the recording apparatus | Performing Operations; Transporting | 20 | Expired |
| US5170184A | Recording apparatus with improved recording medium conveying device | Performing Operations; Transporting | 18 | Expired |
| US6227642A | Waste ink container ink level monitoring in an ink jet recorder | Performing Operations; Transporting | 18 | Expired |
| US5459496A | Electronic typewriter | Performing Operations; Transporting | 10 | Expired |
| US6443552B1 | Carriage moving apparatus, recording apparatus and reading apparatus | Performing Operations; Transporting | 9 | Expired |
| US6567187B1 | Printing apparatus and feeding control method | Electricity | 8 | Expired |
| US5861726A | Recording apparatus with a step motor controlling mechanism | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6213464A | Image forming apparatus | Performing Operations; Transporting | 8 | Expired |
| US6612681B2 | Ink jet recording apparatus recording images when an ink jet recording head is installed thereon and reading head is installed thereon | Performing Operations; Transporting | 8 | Expired |
| US6654133B2 | Recording apparatus | Performing Operations; Transporting | 8 | Expired |
| US5558451A | Shiftable guide member with rollers in a sheet feeding apparatus | Performing Operations; Transporting | 6 | Expired |
| US6318836A | Ink jet recording apparatus recording images when an ink jet recording head is installed thereon and reading images when an image reading head is installed thereon | Performing Operations; Transporting | 6 | Expired |
| USD307436S | Ink ribbon cassette for electronic typewriter | General | 5 | Expired |
| US5781207A | Ink jet recording apparatus | Performing Operations; Transporting | 4 | Expired |
| US6471428B2 | Feeding apparatus, printing apparatus and feeding control method | Performing Operations; Transporting | 3 | Expired |
| US6342956B1 | Ink jet recording apparatus recording images when an ink jet head is installed thereon and reading images when an image reading head is installed thereon | Performing Operations; Transporting | 2 | Expired |
| US7119921B2 | Carriage scanning apparatus | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.