| Patents for A47C 23 - Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases (4,038) |
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| 12/06/1977 | US4060862 Box spring assembly having serpentine right angle bend springs therein |
| 11/15/1977 | US4057860 Box spring assembly |
| 10/25/1977 | US4055337 Spring assembly and clip |
| 10/18/1977 | US4053957 Multi-layered mattress |
| 10/18/1977 | US4053956 Spring assembly |
| 10/11/1977 | US4052760 Coil spring assembly |
| 10/04/1977 | US4051567 Mattress or cushion spring assembly |
| 08/02/1977 | US4038711 Spring assemblies and prefabricated sub-assemblies for manufacture thereof |
| 07/19/1977 | US4035853 Mattress construction for use in hospitals and the like |
| 07/05/1977 | US4033567 Cushioning material construction |
| 06/28/1977 | US4032127 Protective head gear and body equipment |
| 05/03/1977 | US4020512 Bed assembly |
| 04/19/1977 | US4017922 Furniture deck construction |
| 03/22/1977 | US4012802 Mattress foundation |
| 03/22/1977 | US4012801 Box spring assembly |
| 01/25/1977 | US4004304 Box spring assembly |
| 01/25/1977 | US4004303 Spring assembly and boxspring unit incorporating same |
| 01/18/1977 | US4003564 Means mounting torsion springs |
| 01/04/1977 | US4000531 Box spring assembly and grid |
| 11/30/1976 | US3994033 Bedstead |
| 11/23/1976 | US3992732 Box spring construction |
| 11/09/1976 | US3990121 Box spring assembly |
| 10/05/1976 | US3983910 Box spring grid and method of manufacture |
| 09/21/1976 | US3981034 Box spring assembly |
| 08/31/1976 | US3977029 Box spring assembly with coated wire components |
| 07/27/1976 | US3971081 Box spring unit with metal slats |
| 07/13/1976 | US3968528 Bedstead having a woven support |
| 07/06/1976 | US3967331 Springless bed spring |
| 05/25/1976 | US3958610 Innerspring |
| 05/25/1976 | US3958284 Bed frame construction |
| 05/04/1976 | US3953903 Spring unit support and assembly |
| 04/20/1976 | US3950797 Mattress base |
| 03/23/1976 | US3945627 Box spring assembly using modular coil springs |
| 03/09/1976 | US3942777 Seat spring member |
| 03/09/1976 | US3942776 Upholstery coil spring |
| 03/02/1976 | US3940810 Box spring, box spring frame and making same |
| 02/17/1976 | US3938204 Frame construction for box spring assemblies |
| 02/03/1976 | US3935605 Mattress foundation |