The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
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| Number | Title | Issue Date |
| 4441221 | Child support wedge A gymnastic and support wedge for babies and toddlers, especially for multiple and severely handicapped children at kingergarten and school age, includes a wedge-like base plate member, a pair of lateral trough wedge members mountable on the base plate me... | 04/10/1984 |