Patent CA-1890-34397
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From entry it would seem that Knaepfel and Krobat are the applicants, while Lichtfield is also an inventor. (How, though, can Lichtfield be co-inventor with Knaepfel but not Krobat?)
Peter infers that Krobat is an assignee, who bought Lichtfield's share.
- Inventor(s') location: Argentine, Kansas
- Filing date, on the document, is shown as March 10 but the year is not stated. Peter is assuming it's the same as the grant year, because other patents seem to have quick turnaround in the Canadian system. So, 1890, and a 2.5 month delay -- but if we were to find that other patents around the same time took a year to process, 1889 would be a better guess
Sources
- Canadian Patent Office Record for 1890, p. 275
- espacenet
- Patent summary at the Canadian Intellectual Property Office site
| Year filed | 1890 |
|---|---|
| Year granted | 1890 |
| Office | CA |
| Patent number | 34397 |
| Inventors | Ernest G. Knaepfel, Louis L. Lichtfield |
| Inventor country | US |
| Applicant person | Ernest G. Knaepfel, John Krobat |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 0 |
| Original title | Flying Toy; Jouet volant |
| English title | Flying toy |
| Tech fields | fun, helicopter, toy |
| Filing date | 1890-03-10 |
| Full specification filed date | |
| Application number | |
| Grant date | 1890-05-22 |
| Granted? | 1 |
| Publication date | |
| Supplementary to patent | |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | |
| Assigned to | |
| National tech categories | CA 46/61 |
| IPCs | |
| CPCs | |
| Family year | 1890 |
| First filing? | 1 |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | |
| INPADOC family ID | |
| Number of text pages | |
| Number of diagram pages | |
| Number of figures | |
| Number of claims | 1 |
