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| Number | Title | Issue Date |
| 4745039 | Sealed lead storage battery A sealed lead storage battery including at least one negative electrode plate capable of absorbing oxygen gas generated from a positive electrode plate during recharging thereof, which battery comprises a battery casing having a breathing hole defined the... | 05/17/1988 |
| 4664994 | Enclosed lead storage battery and process for producing the same The present invention provides an enclosed lead storage battery comprising a plate assembly consisting of a positive plate, negative plates and a separator, an electrolyte held in position by the plate assembly, and a jacket made of film- or sheet-formed ... | 05/12/1987 |
| 4659636 | Sealed storage battery The present invention is a sealed storage battery wherein a plurality of flattened unitary cells formed by sealing a polar plate group in an outer bag made of a sheet or a film of synthetic resin are stacked in a direction thicknesswise thereof and accomm... | 04/21/1987 |
