Pre-Tech Co., Ltd.
Tokyo, JP· latest recorded location
Pre-Tech Co., Ltd. is named on 6 US grants and 0 published applications in this corpus. Its most frequent classification is B08B (Cleaning in general).
- Granted patents
- 6
- Published applications
- 0
- Inventors
- 9
- Granted in 2026 so far
- 0
- Most recent grant
- 18 Apr 2000
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
By publication year.
Technology areas
Share of 6 documents
- B08BCleaning in general5
- H10PGeneric processes or apparatus for the manufacture or treatment of devices covered5
- C02FTreatment of water, waste water, sewage, or sludge2
- Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2
- A61BMedical diagnosis and surgery1
- C11DDetergent compositions1
- G02FOptical devices or arrangements for the control of light by modification of1
- G11BInformation storage based on relative movement between record carrier and transducer1
Recent patents
- Apparatus and method for cleaning a precision substrate18 Apr 2000US 6,050,276 A
- Cleaning solution and cleaning method16 Nov 1999US 5,985,811 A
- Cleaning apparatus27 Jul 1999US 5,927,305 A
- Apparatus and method for cleaning semiconductor wafers31 Mar 1998US 5,733,434 A
- Apparatus and method for cleaning semiconductor wafers10 Mar 1998US 5,725,753 A
No published applications.
Most cited
By later US patents