2N2271 semiconductor manufactured by Sylvania, listed as 2N2271 (circa 1979).

2N2270S semiconductor manufactured by Sylvania, listed as 2N2270S (circa 1979).

2N2270L semiconductor manufactured by Sylvania, listed as 2N2270L (circa 1979).

2N2270 semiconductor manufactured by Sylvania, listed as 2N2270 (circa 1979).

2N2269 semiconductor manufactured by Sylvania, listed as 2N2269 (circa 1979).

2N2268 semiconductor manufactured by Sylvania, listed as 2N2268 (circa 1979).

2N2267 semiconductor manufactured by Sylvania, listed as 2N2267 (circa 1979).

2N2266 semiconductor manufactured by Sylvania, listed as 2N2266 (circa 1979).

2N2259 semiconductor manufactured by Sylvania, listed as 2N2259 (circa 1979).

2N2258 semiconductor manufactured by Sylvania, listed as 2N2258 (circa 1979).

2N2257 semiconductor manufactured by Sylvania, listed as 2N2257 (circa 1979).

2N2256 semiconductor manufactured by Sylvania, listed as 2N2256 (circa 1979).

2N2255 semiconductor manufactured by Sylvania, listed as 2N2255 (circa 1979).

2N2254 semiconductor manufactured by Sylvania, listed as 2N2254 (circa 1979).

2N2253 semiconductor manufactured by Sylvania, listed as 2N2253 (circa 1979).

2N2252 semiconductor manufactured by Sylvania, listed as 2N2252 (circa 1979).

2N2251 semiconductor manufactured by Sylvania, listed as 2N2251 (circa 1979).

2N2250 semiconductor manufactured by Sylvania, listed as 2N2250 (circa 1979).

2N2249 semiconductor manufactured by Sylvania, listed as 2N2249 (circa 1979).

2N2248 semiconductor manufactured by Sylvania, listed as 2N2248 (circa 1979).