NLRB Stats Archive › Annual Reports › FY1956 › Unfair labor practice and representation cases received — by industry
Unfair labor practice and representation cases received — by industry
| Industrial group 1 | All cases | Unfair labor practice cases | Unfair labor practice cases | Unfair labor practice cases | Unfair labor practice cases | Representation cases | Representation cases | Representation cases |
|---|---|---|---|---|---|---|---|---|
| Industrial group 1 | All cases | CA 2 | CB 2 | CC 2 | CD 2 | RC 2 | RM 2 | RD 2 |
| Manufacturing—Continued | ||||||||
| Rubber products | 88 | 29 | 0 | 0 | 0 | 57 | 0 | 2 |
| Leather and leather products | 164 | 46 | 4 | 8 | 0 | 96 | 5 | 5 |
| Stone, clay, and glass products | 305 | 65 | 14 | 2 | 2 | 206 | 11 | 5 |
| Primary metal industries | 446 | 107 | 25 | 2 | 2 | 286 | 13 | 11 |
| Fabricated metal products (except machinery and transportation equipment) | 874 | 226 | 39 | 9 | 0 | 542 | 34 | 24 |
| Machinery (except electrical) | 826 | 188 | 29 | 6 | 1 | 544 | 26 | 32 |
| Electrical machinery, equipment, and supplies | 499 | 143 | 27 | 2 | 0 | 285 | 14 | 27 |
| Aircraft and parts | 192 | 63 | 18 | 1 | 1 | 95 | 6 | 8 |
| Ship and boat building and repairing | 69 | 20 | 3 | 1 | 0 | 39 | 2 | 4 |
| Automotive and other transportation equipment | 248 | 64 | 15 | 3 | 0 | 149 | 6 | 11 |
| Professional, scientific, and controlling instruments | 81 | 21 | 11 | 1 | 0 | 42 | 2 | 3 |
| Miscellaneous manufacturing | 434 | 121 | 37 | 11 | 1 | 234 | 22 | 3 |
| Agriculture, forestry, and fisheries | 31 | 18 | 5 | 1 | 0 | 5 | 1 | 1 |
| Mining | 216 | 72 | 12 | 12 | 2 | 107 | 6 | 5 |
| Metal mining | 64 | 14 | 2 | 0 | 0 | 43 | 3 | 2 |
| Coal mining | 43 | 33 | 2 | 7 | 0 | 0 | 0 | 1 |
| Crude petroleum and natural gas production | 12 | 6 | 0 | 0 | 0 | 3 | 0 | 3 |
| Nonmetallic mining and quarrying | 97 | 19 | 3 | 9 | 0 | 58 | 3 | 3 |
| Construction | 934 | 232 | 271 | 185 | 109 | 119 | 18 | 0 |
| Wholesale trade | 1,003 | 203 | 35 | 33 | 1 | 621 | 90 | 20 |
| Retail trade | 1,239 | 267 | 53 | 23 | 8 | 736 | 75 | 33 |
| Finance, insurance, and real estate | 38 | 19 | 1 | 1 | 0 | 16 | 0 | 1 |
| Transportation, communication, and other public utilities | 1,541 | 408 | 375 | 73 | 15 | 553 | 79 | 38 |
| Highway passenger transportation | 53 | 18 | 6 | 0 | 0 | 23 | 2 | 4 |
| Highway freight transportation | 509 | 164 | 76 | 32 | 0 | 170 | 57 | 8 |
| Water transportation | 354 | 145 | 145 | 25 | 2 | 25 | 6 | 5 |
| Warehousing and storage | 160 | 24 | 11 | 5 | 7 | 102 | 5 | 4 |
| Other transportation | 40 | 6 | 3 | 5 | 0 | 21 | 5 | 1 |
| Communication | 280 | 33 | 129 | 6 | 2 | 84 | 4 | 7 |
| Heat, light, power, water, and sanitary services | 115 | 18 | 5 | 0 | 4 | 74 | 5 | 3 |
| Services | 328 | 107 | 28 | 1 | 4 | 170 | 14 | 6 |
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Source data: U.S. NLRB Annual Reports (public domain). Reconstruction by NLRB Stats Archive. Updated June 2026.