Prototypes, Ltd.
Bath, GB· latest recorded location
Prototypes, Ltd. is named on 5 US grants and 0 published applications in this corpus. Its most frequent classification is A47L (Domestic washing or cleaning).
- Granted patents
- 5
- Published applications
- 0
- Inventors
- 1
- Granted in 2026 so far
- 0
- Most recent grant
- 2 May 1989
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
By publication year.
Technology areas
Share of 5 documents
Recent patents
- Vacuum cleaning apparatus2 May 1989US 4,826,515 A
- Vacuum cleaning appliances7 Oct 1986US RE32,257 E
- Vacuum cleaning appliance10 Jun 1986US 4,593,429 A
- Vacuum cleaning appliances4 Mar 1986US 4,573,236 A
- Upright vacuum cleaning appliance25 Feb 1986US 4,571,772 A
No published applications.
Most cited
By later US patents