2N241A semiconductor manufactured by Sylvania, listed as 2N241A (circa 1979).

2N169A semiconductor manufactured by Sylvania, listed as 2N169A (circa 1979).

2N513B semiconductor manufactured by Sylvania, listed as 2N513B (circa 1979).

2N420A semiconductor manufactured by Sylvania, listed as 2N420A (circa 1979).

2N334A semiconductor manufactured by Sylvania, listed as 2N334A (circa 1979).

2N241 semiconductor manufactured by Sylvania, listed as 2N241 (circa 1979).

2N169 semiconductor manufactured by Sylvania, listed as 2N169 (circa 1979).

2N513A semiconductor manufactured by Sylvania, listed as 2N513A (circa 1979).

2N420 semiconductor manufactured by Sylvania, listed as 2N420 (circa 1979).

2N334 semiconductor manufactured by Sylvania, listed as 2N334 (circa 1979).

2N240 semiconductor manufactured by Sylvania, listed as 2N240 (circa 1979).

2N168A semiconductor manufactured by Sylvania, listed as 2N168A (circa 1979).

2N513 semiconductor manufactured by Sylvania, listed as 2N513 (circa 1979).

2N419 semiconductor manufactured by Sylvania, listed as 2N419 (circa 1979).

2N333A semiconductor manufactured by Sylvania, listed as 2N333A (circa 1979).

2N168 semiconductor manufactured by Sylvania, listed as 2N168 (circa 1979).

2N512B semiconductor manufactured by Sylvania, listed as 2N512B (circa 1979).

2N418 semiconductor manufactured by Sylvania, listed as 2N418 (circa 1979).

2N333 semiconductor manufactured by Sylvania, listed as 2N333 (circa 1979).

2N238F semiconductor manufactured by Sylvania, listed as 2N238F (circa 1979).