| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Folding cot | US4862125 | 1925-08-06 | US1668103A | 1928-05-01 | CABLE JULIUS L |
| 22 | Red of collapsible type | US5804425 | 1925-09-23 | US1602679A | 1926-10-12 | KIBLER JR JOHN |
| 23 | Folding cot | US7104125 | 1925-11-24 | US1602115A | 1926-10-05 | JACK MALIS |
| 24 | Stretcher | US61690323 | 1923-02-05 | US1482487A | 1924-02-05 | SHEETS JESSE T |
| 25 | Collapsible bed | US50337021 | 1921-09-26 | US1444143A | 1923-02-06 | STOLL FRANK M |
| 26 | Cot | US44154921 | 1921-02-01 | US1427476A | 1922-08-29 | LANE JOHNSON |
| 27 | Folding camp-bed | US35013620 | 1920-01-08 | US1359844A | 1920-11-23 | PARK SALLE GEORGE; SALLE GEORGE F |
| 28 | Ambulance-stretcher. | US16006817 | 1917-04-05 | US1277856A | 1918-09-03 | CHASSAING EUGENE |
| 29 | Stretcher. | US7595116 | 1916-02-03 | US1246544A | 1917-11-13 | CHASSAING EUGENE |
| 30 | Couch and couch-bed. | US1912691593 | 1912-04-18 | US1089723A | 1914-03-10 | QUINCY FREDERICK J |
| 31 | Folding bedstead. | US1904229892 | 1904-10-25 | US795618A | 1905-07-25 | JAMES FREDERICK REESOR |
| 32 | Reclining cot or lounge. | US1903148385 | 1903-03-18 | US753815A | 1904-03-01 | MILLER WEBB |
| 33 | chorlton | US448209D | US448209A | 1891-03-17 | ||
| 34 | Cot-bed | US399254D | US399254A | 1889-03-12 | ||
| 35 | Geoege e | US319055D | US319055A | 1885-06-02 | ||
| 36 | Improvement in cot-beds | US135573D | US135573A | 1873-02-04 | ||
| 37 | Improvement in hammock bedsteads | US127892D | US127892A | 1872-06-11 | ||
| 38 | gillette | US63500D | US63500A | 1867-04-02 | ||
| 39 | Bedstead | US15235D | US15235A | 1856-07-01 | ||
| 40 | CONVERTIBLE BACKPACK FRAME | US14790029 | 2015-07-02 | US20170000245A1 | 2017-01-05 | Michael E. McDuffee |
| A backpack frame is convertible from a frame position to a cot position. The backpack frame includes: a first U-shaped member having a closed end and an open end, a first intermediate member having a distal end and a proximal end, the proximal end is hingably connected to the open end of the first U-shaped member, a second intermediate member having a distal end and a proximal end, the distal end of the first intermediate member is hingably connected to the distal end of the second intermediate member, a second U-shaped member having a closed end and an open end, the proximal end of the second intermediate member is hingably connected to the open end of the second U-shaped member. In the frame position, the first U-shaped member, the first intermediate member, the second intermediate member, and the second U-shaped member lie in a single plane. | ||||||
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